List of A Certain Magical Index characters

Voiced by: Atsushi Abe[1] (Japanese); Micah Solusod[2] (English)

Tōma Kamijō (上条 当麻, Kamijou Touma) is a first-year high school student and Level 0 esper with an ability to negate anything related to supernatural called "Imagine Breaker" (幻想殺し (イマジンブレイカー), Gensō Goroshi (Imajin Bureikā), lit. "Illusion Killer"). Upon meeting Index, he becomes involved in major events that take place in A Certain Magical Index franchise. With his meeting with Mikoto Misaka and involvement in the dark side of Academy City, Tōma is seen in major events in A Certain Scientific Railgun franchise as well.

Voiced by: Yuka Iguchi[3] (Japanese); Monica Rial[2] (English)

Index Librorum Prohibitorum (禁書目録 (インデックス), Indekkusu) is a fifteen-year old English nun from Church of England's Necessarius with Dedicatus545 ("The devoted lamb protects the knowledge of the strong") as her magic name. She is always seen wearing the "Walking Church", a white robe with a golden embroidery sewn on every edge of it (later with golden pins after Tōma Kamijo destroyed it with his Imagine Breaker). Index's mind has been implanted with 103,000 grimoires of the Index Librorum Prohibitorum since she possesses photographic memory and is the only magician who can read grimoires that are deadly to a normal magician or individual. She has a self-protection system personality called "John's Pen" (自動書記 (ヨハネのペン), Yohane no Pen, lit. "Automatic Writing"), which allows her to cast high-class magic attacks such as "St. George's Sanctuary" (聖ジョージの聖域 (セントじょーじのせいいき), Seinto Jōji no Seīki) and "Dragon's Breath" (竜王の殺息 (ドラゴンブレス), Doragon Buresu, lit. "Killing Breath of the Dragon King"). Index's self-protection system has a by-product called "Feather of Light" (光の羽, Hikari no Hane), which forces a reset on her memory in case a manual reset fails to be performed. Although she does not know that she has magical powers, she can easily identify the types of magic by seeing it or somebody describing it to her and know how to counter them. Her vast knowledge of the Index Librorum Prohibitorum within her mind makes her be one of the most powerful characters so far and becomes very helpful to her friends in various situations using skills like "Spell Intercept" (強制詠唱 (スペルインターセプト), Superu Intāseputo, lit. "Force Chant") and "Sheol Fear" ((魔滅の声 (シェオールフィア), Sheōru Fia, lit. "Voice of Destruction of Evil").

Index is often elated by a variety of things and is slightly ignorant and curious about modern technology. She usually is gentle and polite with people and has a kind nature, but is also a selfish spoiled brat when together with Tōma. She is also abusive towards him and hypocritical, chiding him for doing things she doesn't like, yet does the same things herself. She constantly jumps to conclusions without learning the circumstances first and constantly punishes Toma, wrongfully, by biting him or starting arguments with him, much to his confusion and exasperation. Index also has a large appetite and likes watching an anime series titled Magical Powered Kanamin. She has strong feelings towards Tōma and even confessed her love after hearing Tōma lost his memories because of her; however, he avoided answering by changing the theme of the talk since he has no idea about what kind of feelings he used to have with Index.

When she returns to England, Index is sought out by Fiamma of the Right, who wants her knowledge, and is reactivated in her John's Pen mode by her remote control magical item. Later during her stay at Necessarius' headquarters in St. George Cathedral, Index learns the bitter truth about Tōma when Fiamma reveals him lying to her about his memories, which sends her on a rampage and grows an angelic "Crimson Wings" that corners Stiyl Magnus, who tries to restrain her, with ease just by flapping her wings. She also has displayed the ability to summon legendary weapons and artifacts to attack, such as the "Sword of Freyr", the magic sword of the Norse goddess of the same name. After defeating Fiamma, Tōma releases Index's mind from his control, apologizes to her, and both promise each other to meet again. At the end of the twenty-second volume of A Certain Magical Index, Index returns to St. George Cathedral with Stiyl to learn what happened to Tōma.

In A Certain Magical Index: New Testament, Index eventually reunites with Tōma when he reappears in Academy City after the events of World War III. She later joins Tōma, Accelerator, Shiage Hamazura, Rikō Takitsubo, and Aleister Crowley during the latter's invasion of London, where she learns another grimoire for a total of 103,001. She also engages in a fight with Mikoto Misaka during a conflict between Tōma and his doppelganger in Windsor Castle.

In A Certain Magical Index: Genesis, Index returns to Academy City with Tōma in time for a Christmas holiday but is later sent on a mission to investigate the disappearance of residents in Los Angeles.

Voiced by: Rina Satō (Japanese); Brittney Karbowski[2] (English)

Mikoto Misaka (御坂 美琴) is one of the main heroines from the science side in A Certain Magical Index, as well as the main protagonist and the titular character of A Certain Scientific Railgun. She is Academy City's #3 Level 5 esper with an ability called Railgun (超電磁砲 (レールガン), Chō-Denjihō (Rērugan), lit. "Super Electromagnetic Cannon") that allowed her to produce one billion volts of electricity, making her the most powerful Electromaster in Academy City.

Voiced by: Nobuhiko Okamoto (Japanese); Austin Tindle[2] (English)

Accelerator (一方通行 (アクセラレータ), Akuserarēta) is one of the main characters in the science side in A Certain Magical Index, as well as the main protagonist and titular character of A Certain Scientific Accelerator. He is the most powerful esper in Academy City, ranking at the top of the seven Level 5s in the city. His real name is unknown, though Accelerator recalls his surname was composed of two kanji characters and his given name consisted of three kanji characters. First appearing as an antagonist of the third light novel, he later becomes the main protagonist in the science side of the Toaru Majutsu no Index series in a notable number of volumes of the light novels. His name is written as "Ippōtsūkō", meaning "One-Way Road". His eponymous ability allows him to control any vector he touches including motion, heat, electricity, and wind. This allows him to perform various feats such as reflecting bullets, launching heavy objects, and even reversing the flow of blood in people's bodies. Since his natural ability blocks all ultraviolet radiation, he has an appearance with white hair.

Accelerator's unique ability makes him the subject of an experiment attempting to create the first Level 6 esper: according to the city's best supercomputer, Tree Diagram (which was unprecedentedly destroyed by Index's Dragon Breath), this feat could only be achieved by killing Misaka Mikoto, the Railgun, 128 times without a single failure. Since it was impossible to procure 128 Railguns, an alternative plan was formed to "level up" Accelerator by having him kill 20,000 skilled Level 3 espers: the Misaka clones. He willingly joins the experiment to gain a reputation as the most powerful and feared esper so that no one would be foolish enough to challenge him. His desire to achieve this goal leads him to kill many who got in his way. Mikoto tries to stop the experiment to save her sisters, but it is Tōma who finally does so and defeats Accelerator after discovering his weakness: Accelerator was physically weak because of his total reliance on his powers and his overconfidence in his esper abilities. Therefore, Tōma beat him with his Imagine Breaker and street-fighting skills.

After his defeat in volume three of the light novels, he reappears in the fifth novel where his past was also revealed. He was taken to Academy City at a young age when his powers were first discovered but because of the lack of understanding of his powers, people fear him and in some cases tried to kill him. Due to the many attempts on his life and the numerous experiments performed on him, these events shaped Accelerator into a sadist and made it difficult for him to trust anyone except for Kikyou Yoshikawa, the only scientist who ever cared about him and saved his life. He also takes a more heroic and fatherly role by protecting a young girl named Last Order, the last Misaka clone who believes through the memories of the Sister clones who fought him that Accelerator is not a bad person and never wanted to hurt the clones but tried to merely intimidate them into not fighting him, a theory Accelerator dismisses. In the aftermath of the incident, Accelerator is shot in the head by Ao Amai and acquires aphasia due to brain damage. The injury also affects his ability but Heaven Canceller jury-rigs a choker-like device to his brain, allowing Accelerator to tap into the Misaka Network to make up for his injury and function normally. He can also switch the transmitter to full power, restoring his ability for a maximum of 15 minutes in the beginning, but the time is later extended to 30 minutes by an update to the device. Toward the end of volume 13, Accelerator begins to "awaken" after nearly being killed by Amata Kihara and his aphasia is somehow temporarily cured. He truly "awakens" in volume 15, gaining black wings when fighting another "awakened" level 5, Teitoku Kakine. In the events of the 19th novel, he meets Aiwass, a higher dimensional being, summoned to their plane of existence. Aiwass explains to him when AIM entities like him are manifested, Last Order is heavily strained and may die if left untreated. To help Last Order, who has collapsed from sustaining Aiwass, Accelerator follows Aiwass's advice and heads to Russia during World War III in search of Index, unaware that he has met her before.

In Russia, after being ambushed by Russian mages, he acquires the "Goatskin", a mysterious document sought after by both Academy City and the Russian government that has the knowledge about the Archangels and Heaven, and later runs into a Misaka Worst clone, learning that Aleister intends to eliminate Last Order, now obsolete to create a new Misaka network. Despite being more powerful than Misaka Worst, Accelerator is unable to bring himself to harm another Sister clone after the Level 6 experiment and becomes mentally unstable after the clone attempts to kill Last Order and later tries to kill herself. Accelerator goes on a rampage until Tōma arrives where he turns his frustration regarding Last Order's condition onto Tōma and a fight ensues between the two. After Accelerator is defeated again, Tōma uses his Imagine Breaker to stabilize Last Order and leaves a note informing him of Index's true whereabouts. Later, he joins forces with Elizarinian soldiers and Misaka Worst to find spies in their country and fought Archangel Gabriel along with Hyōka, where after studying the Goatskin, he learns to understand the angel's language and turning himself into an angel as a side effect. With his new powers, he is able to decode one of Index's songs and was finally able to cure Last Order but is injured in the process.

After the Third World War, Accelerator is given his freedom with the help of Shiage, after he threatens the Academy City's administration to leave him, Last Order, and Misaka Worst alone and orders them to stop all illegal black projects in the city. However, both he and Shiage actions anger a new group of espers called the "Freshmen" who are aware of the existences of Magic and sees them as an obstacle in Academy City's war against the Magic factions. After being helped by Tōma and Leivinia Birdway, the latter invites him to join the world of Magic and involved in an operation in Hawaii.

At the end of Coronzon story arc, Accelerator received a master code list for Academy City, and the full authority of the Board Chairman from the dying Aleister Crowley, become the new Board Chairman of Academy City.

Voiced by: Satoshi Hino (Japanese); Clifford Chapin (English)

Shiage Hamazura (浜面 仕上) is one of the main characters in the science side in A Certain Magical Index. He is a former member of Skill-Out, a group of Level 0s who use various means to counter esper abilities, who accidentally gets caught up with the Dark Side of Academy City. He is first introduced in the Side Story novels where he became the leader of his Skill-Out gang after Accelerator killed the former leader, his best friend Ritoku Komaba on the orders of the Board of Directors. On the same day he became the new leader, his gang was forced by the Board of Directors to kill Mikoto's mother, Misuzu, or face extermination. However, he and his gang were defeated by Tōma and Accelerator and they failed to kill Misuzu. Humiliated, he left the gang to his friend Hattori Hanzo and became a chauffeur and informant for Team ITEM where he fell in love with one of their members, Rikō Takitsubo.

During the 15th novel, Team ITEM is involved in a war between the various underground organization where Shiage helps them by providing transport by stealing cars around the city. But when Team ITEM is defeated by Team SCHOOL led by its leader, Teitoku Kakine, Shizuri Mugino, the leader of Team ITEM, wants revenge for being humiliated no matter what and forces an injured Rikō to use her powers to find Teitoku despite the fact that repeated use of her powers will kill her. In order to save Rikō, Shiage fights against Shizuri and despite the odds, he manages to defeat Shizuri by using her pride and powers against her. However, this unexpected incident becomes a thorn in Aleister's plans as there was no way Shiage could defeat Shizuri as she is a Level 5. Seeing him as an unpredictable anomaly that will disrupt his future plans, Aleister puts a bounty on Shiage and orders the forces of Academy City's dark side to kill him. Ironically, he is saved by Shizuri, who survived their battle and now has a sense of twisted love for him (declaring she will castrate him as her sign of affection). She lets him and Rikō escape Academy City by stealing a jet and shoots down his pursuers, declaring that he is her prey and hers alone.

Shiage and Rikō escape to Russia only to find themselves in a war between Academy City and Russia. After being saved by Acqua of the Rear, Shiage and Rikō head to the nation of Elizarina where Rikō is partially healed by Accelerator and aids Acqua. In order to protect a document called the Kremlin Report, Shiage and Rikō head towards the same nuclear military base that Mikoto went to while they were being chased by Academy City forces and later Shizuri. However, Shizuri collapses from over-exhaustion as her fragile body is suffering from the effects of using too much Body Crystal, a dangerous drug that Rikō uses to activate her powers. Unable to see her this way, Shiage begs Shizuri to let go of her pride and see reason and be the Shizuri that use to care for her teammates which strokes a cord within her and makes peace with him as she protects him and Rikō from the rest of the invading Academy City forces. After capturing a member of the Board of Directors who led the Academy City forces and torturing him, he reveals to Shiage a document called the Parameter List, which reveals that the Academy City administration has been secretly interfering with the Power Curriculum Program and preventing most of the city's students from gaining or raising their powers.

After the Third World War, Shiage is given amnesty and the assassination order on him removed thanks to Accelerator and makes a deal with the Academy City's administration, where he will not expose the truth about the Parameter List and he, along with Rikō and Shizuri is allowed to return to Academy City to reform Team ITEM. However, his and Accelerator's actions have made them enemies with a new group of espers called the "Freshmen" who is aware of the existence of Magic who sees both of them as an obstacle in Academy City's war against the Magic factions. After Tōma and Leivinia help him and Accelerator against the "Freshmen", Tōma introduces them to the world of Magic and involved in an operation in Hawaii.

The unnamed high school that Tōma Kamijo attends.

Voiced by: Kimiko Koyama[4] (Japanese); Jad Saxton[2] (English)

Komoe Tsukuyomi (月詠 小萌) is the homeroom teacher of Tōma Kamijō's class. She is well-known for her height of 135 centimetres (53 in) yet is an adult who loves to drink beers and smoke cigarettes, and appears to be childish in her voice and mannerism as she contradicts her age in front of her students by ending her sentences with desu (a Japanese copula).[5] Komoe does not possess an esper power but becomes capable of casting a healing spell after helping in treating Index and Aisa Himegami. She is regarded as one of the school's seven mysteries and postulated by Accelerator to be a successful test subject of an experiment involving ways to stop cell aging. A Certain Magical Index light novel author Kazuma Kamachi revealed that she is the oldest character he introduced so far.[6]

Voiced by: Anri Katsu[7] (Japanese); Newton Pittman[2] (English)

Motoharu Tsuchimikado (土御門 元春) is an onmyōdō magician from Necessarius, with Fallere825 ("the backstabbing blade") as his magic name, and one of Tōma Kamijo's best friends after infiltrating Academy City as a spy. He is also a Level 0 esper with an ability called "Auto-Rebirth", which allows him to repair damaged blood vessels, making him the only successful magician-esper hybrid but limiting his use of magic.[7] Motoharu is always seen wearing sunglasses and an aloha shirt, and ends his sentences with nya (an onomatopoeia equivalent to the Japanese word for "meow"). He is deeply involved during the events of Angel Fall spell incident, in a manhunt of Oriana Thomson amid Daihasei Festival in Academy City, in a mission with Tōma to retrieve the Document of Constantine in France, and during the uprising of several dark side organizations in Academy City as the de facto leader of GROUP. Motoharu's major appearance in A Certain Magical Index: New Testament light novel volumes centers around the involvement of his stepsister Maika. He is last seen at Tahiti along with her in the final volume.

Voiced by: Yoshihisa Kawahara (Japanese); Scott Freeman (Index I, Index II, Railgun S, Endymion),[2] Patrick McAlister (Index III, Railgun T) (English)

Pierce Aogami (青髪 ピアス, Aogami Piasu, lit. "blue hair and piercings") is one of Tōma Kamijo's best friends and the president of their class. His name is an aptronym based on his appearance, with his true name remaining a secret to this day, but most of his admirers call him "Blau" (a German word for "blue"). In A Certain Scientific Railgun franchise, he is revealed to be an S-ranked Dream Ranker, one of the highest ranks in creating dreams for Indian Poker cards.[8]

Voiced by: Mamiko Noto[9] (Japanese); Lindsay Seidel[2] (English)

Aisa Himegami (姫神 秋沙) is a miko-wearing rare esper with an ability called "Deep Blood", which attracts vampires with her sweet blood scent. Her life becomes miserable after her power killed her family and friends, causing her to arrive in Academy City for a cure and meet Aurelous Izzard. After Tōma Kamijo rescued her from Aurelous, Aisa is given a Celtic cross necklace by Necessarius to restrain her power, moves in Komoe Tsukuyomi's apartment, and transfers from Kirigaoka Girls' Academy to Tōma's high school. Aisa begins showing feelings for Tōma but jokingly compares his life to a dating sim because of his involvement with other girls. Kamachi wrote the character as a "girl who couldn’t become the story’s heroine".[10]

Voiced by: Yūko Kaida[11] (Japanese); Martha Harms[2] (English)

Aiho Yomikawa (黄泉川 愛穂) is a physical education teacher and an Anti-Skill officer. She is known for wearing a green jersey that outlines her large breasts and ending her sentences with jan. Aiho's colleagues at Anti-Skill call her the "woman who makes the serious comical" due to her habit of subduing delinquents with protective gears like riot shields and helmets. She becomes the guardian of Accelerator and Last Order after her friend Kikyō Yoshikawa asked a favor to take care of them.

Voiced by: Ayumi Fujimura[12] (Japanese); Skyler McIntosh[13] (English)

Seiri Fukiyose (吹寄 制理) is one of Tōma Kamijō's classmates and acts as their class president despite the position being held by Pierce Aogami. Her appearance is described as "pretty but lacks sex appeal" and has a big forehead, which she uses for her special move called "Fukiyose Forehead DX".[12] She has a crush on Tōma but acts tsundere when in his presence, hating him for blaming his life on misfortunes. Seiri is a health freak due to her frequent ordering of different health products from shopping channels.

Voiced by: Yumi Hara[14] (Japanese); Natalie Hoover (English)

Suama Oyafune (親船 素甘) is a math teacher and Monaka's daughter. She shows an obsession with her beauty as she takes multiple baths a day, puts on lotion before going to bed, eats breakfast every day, keeps her weight in check, spends her morning hours putting on makeup, and buys Western clothes from shopping channels.

Voiced by: Bryan Massey (English)

Saigo (災誤) is a teacher and counsels students when Suama Oyafune requests him by whistling. Saigo is mistaken for Acqua of the Back by Itsuwa when she finds him chasing after Tōma Kamijō.

Voiced by: Yukiyo Fujii[15]

Seria Kumokawa (雲川 芹亜) is Maria's older sister and a third-year student who serves as Tsugutoshi Kaizumi's advisor and the leader of his Use of Force Unit. She is usually seen wearing the school-issued sailor uniform that shows her navel between the blouse and skirt. Seria knows Tōma Kamijō even before his memory loss and has regrets of having limited control over his frequent involvement in dangerous situations. She has romantic feelings for him, causing a rift between her and Misaki Shokuhō. Seria does not have special powers yet her skills can rival Misaki's Mental Out ability since she defeats her opponents using intelligence and psychology.

Tokiwadai Middle School (常盤台中学校, Tokiwadai Chūgakukō) is an elite girl's middle school and one of the five prestigious schools in Academy City, which was located in District 7's School Garden. It is the school that Mikoto Misaka and Misaki Shokuhō attended. The school's admission requires espers to be a Level 3 or higher.

Voiced by: Satomi Arai (Japanese); Alison Viktorin (English)

Kuroko Shirai (白井 黒子) is a first-year student and Mikoto Misaka's kōhai. She is one of the main protagonist of A Certain Scientific Railgun. Kuroko is a Level 4 esper with an ability called Teleport (空間移動 (テレポート), Kūkan Idō (Terepōto), lit. "Spatial Movement"), which allows her to teleport herself and/or objects she touched under a total weight of around 130–137 kilograms (287–302 lb) to anywhere within a radius of around 81–85 metres (266–279 ft) but it requires an amount of concentration for the successful execution of the power. She is a member of Judgment and generally carries a strap of nails around her legs, which was used during her work to pin down enemies. Kuroko has an obsessive and perverted crush on Mikoto, whom she addressed as "onē-sama" (おねえさま, revered big sister) or "Sissy" in the anime's English dubbing. She is on the constant lookout for a chance to get physically intimate with her, which ended up in her being electrocuted. She gets jealous of other people who got Mikoto's attention, mostly to Tōma Kamijō.

Kuroko is officially debuted in the eighth volume of A Certain Magical Index light novel series when she investigated a robbery and discovered Mikoto's involvement in the incident. She gets injured by Awaki Musujime during their fight in a restaurant, but she is later saved by Tōma and Mikoto before Awaki can unleash an enormous teleported mass on her. After the events surrounding the Tree Diagram Remnant story arc in this volume, Kuroko is confined to a wheelchair for some time because of the injuries she sustained from the battle.

Voiced by: Azumi Asakura (Japanese); Teri Rogers (English)

Misaki Shokuhō (食蜂 操祈) is a second-year student who led the largest clique in the school, earning her the title "The Queen of Tokiwadai". She is Academy City's #5 Level 5 esper with an ability called Mental Out (心理掌握 (メンタルアウト), Shinri Shōaku (Mentaru Auto), lit. "Psychological Control") that used remote controls hidden in her sling bag to execute her mind-related powers such as mind read, telepathy, brainwashing, psychometry, and memory erasure. However, her power has setbacks such as she cannot use it on Electromasters, animals and machines, and especially Tōma Kamijō. Misaki does not trust anyone whose minds she could not read, except for Tōma. She prefers to hide from the public so she sends her follower or a mind-controlled individual as her representative instead.

Misaki is involved in the Exterior Project that would greatly boost her power by cultivating a cut portion of her brain's cerebral cortex. She is then requested by researchers of the Clone Dolly Project to act as Dolly's missing friend aliased "Mi-chan" by altering her memories that would make Misaki the friend in her mind. Misaki eventually learns about the researchers' plan of disposing of her upon the Exterior's completion. She decides to brainwash the scientists involved in the project and take over the building.

Misaki's backstory makes a debut in the eleventh volume of New Testament: A Certain Magical Index light novel series when she bumped into Tōma for the first time at an intersection road during her early days as a first-year student. She then meets him several times during the summer and receives a cheap whistle from him to be used for emergencies, which she greatly treasured. Their meeting is short-lived when Misaki was targeted by an organization called "Deadlock", causing Tōma to get badly injured after he protected her from their attacks using his body. Misaki uses her power to manipulate his brain's fluids, which would cut off his sense of pain and lets the EMT continue treating him, but she finds her treatment ineffective because of his low blood pressure, leaving him brain damage that caused him unable to remember or make memories with her.

In the Ichihanaran Festival story arc, Misaki prevents Mikoto Misaka from taking a trial enrollment in Tōma's high school by making mind-controlled individuals chase after her. She then competes in a swimsuit contest against Seria Kumokawa. In the Agitate Halation story arc, Misaki helps Tōma in finding the magician who infiltrated the School Garden. She later joins Tōma in London along with Mikoto as he confronts the Golden Dawn magic cabal during the Coronzon story arc. Misaki is heavily involved in the Kamijō story arc as she becomes mentally unstable due to her confusion between Tōma's doppelganger, who could remember her, and the real one, who retained the brain damage that prevented him from remembering or making memories with her. Misaki is last seen in a hospital where she was confined because of the injuries she sustained from her fight against Anna Sprengel to acquire the vaccine for a dying Tōma.

Voiced by: Minako Kotobuki (Japanese); Jamie Marchi (English)

Mitsuko Kongō (婚后 光子) is a transfer student and heiress to Kongō Airlines. She is a Level 4 esper with an ability called Aero Hand (空力使い (エアロハンド), Kūryoku Tsukai (Earo Hando), lit. "Vacuum User") that could create a powerful gust of wind to propel any objects she touched like a missile. Mitsuko shows pride in herself despite being a new student of the school but she shows ignorance of common routines such as finding directions and kitchen-related work. She is usually seen carrying a fan and has a pet boa constrictor named Ekaterina.

Mitsuko is first introduced as a minor character in the eighth volume of A Certain Magical Index light novel series when she told Kuroko Shirai about her plan of creating a clique in the school and heard Mikoto Misaka's power being tested nearby a swimming pool. Her role is extended in A Certain Scientific Railgun manga and anime series.

Voiced by: Haruka Tomatsu (Japanese); Kristi Kang (English)

Kinuho Wannai (湾内 絹保) is Kuroko Shirai's classmate and Mitsuko Kongō's friend. She is a Level 3 esper with an ability called Hydro Hand (水流操作 (ハイドロハンド), Suiryū Sōsa (Haidoro Hando), lit. "Water Current Manipulation") that allowed her to manipulate water with a maximum volume of 400 litres (400,000 mL) in four separate clumps and launch them within a range of 18 metres (59 ft). Kinuho befriends Mikoto Misaka because she is thankful for her heroic deed when she was saved by her from delinquents during her early days as a transferee student.

Kinuho has a small cameo in the sixteenth volume of New Testament: A Certain Magical Index light novel series when she joined an expedition to destroy the Crystal Tower that guided the Elements creatures. Kinuho briefly converses with Tōma Kamijō but she immediately runs away from him due to her shyness.

Voiced by: Yoshino Nanjō (Japanese); Tia Ballard (English)

Ma'aya Awatsuki (泡浮 万彬) is Mitsuko Kongō's friend and a member of the school's swimming team along with Kinuho Wannai. She is a Level 3 esper with an ability called Float Dial (流体反発 (フロートダイヤル), Ryūtai Hanpatsu (Furōto Daiyaru), lit. "Fluid Repulsion") that allowed manipulation of her and the surrounding's buoyancy to lift heavy objects, walk on water without breaking its surface tension, and leap several meters.

Voiced by: Minami Tsuda (Japanese); Michelle Lee (English)

Junko Hokaze (帆風 潤子) is a third-year student and the most loyal member of Misaki Shokuhō's clique. She is a Level 4 esper with an ability called Rampage Dress (天衣装着 (ランペイジドレス), Ten'i Souchaku (Ranpeijidoresu), lit. "Heavenly Garment Equipping") that allowed manipulation of her body cells' electric signals to achieve certain results like an increased sensitivity of her olfaction by enhancing her olfactory cells and superhuman maneuver by boosting her muscle cells. She is well-known for her ringlet-styled curly hair.

Junko is the protagonist of A Certain Scientific Railgun: Astral Buddy manga spin-off and makes an appearance in the eleventh volume of New Testament: A Certain Magical Index light novel series when she found Misaki about to visit Seria Kumokawa for information regarding her memories with Tōma Kamijō. In the Element story arc, Junko tries to help Misaki in carrying Tōma to the infirmary but she gets declined instead.

Voiced by: Hazuki Ogino (Japanese); Sarah Roach (English)

Satori Kobayashi (口囃子 早鳥) is a third-year student and a member of Misaki Shokuhō's clique. She is a Level 3 esper with an ability called Telepath (念話能力 (テレパス), Nenwa nōryoku (Terepasu), lit. "Mind Induction") that allowed her to telepathically communicate with someone she connected with a "circuit", an extension of her AIM diffusion field.

Voiced by: Naoko Komatsu (Japanese); Meg McClain (English)

Megumi Kirifu (切斑 芽美) is a minor student character introduced in A Certain Scientific Railgun manga and anime series. She is a Level 4 esper with an ability related to telekinesis. Megumi is invited by Mitsuko Kongō to join her clique but she teases her by moving her fan telekinetically until she realizes the joke results in Mitsuko's accident. She apologizes but she refuses her recruitment offer. In the Daihasei Festival story arc, Megumi is part of the school's team during the Balloon Hunter game alongside Misaka #10032 and later in the Cavalry Battle game together with Kinuho Wannai and Ma'aya Awatsuki.

Voiced by: Daisuke Kishio (Japanese); Justin Pate (English)

Mitsuki Unabara (海原 光貴) is the grandson of the school's director. He is a Level 4 esper with an ability called Telekinesis (念動力 (テレキネシス), Nendōryoku (Terekineshisu), lit. "Telekinetic Force") that could control objects from a distance. Mitsuki manages to get his grades through cheating by putting a thin layer of his power on the computer screen for the exam, examining the minute heat and radiation, and reverse-engineering the correct answers. He is later abducted by Etzali to take his form and begin his mission of investigating Tōma Kamijō's influence.

Voiced by: Yumiri Hanamori

Ayu Mitsuari (蜜蟻愛愉) is a first-year student introduced in the eleventh volume of New Testament: A Certain Magical Index light novel series as the antagonist of Misaki Shokuhō. She is a Level 3 esper with an ability called Mental Stinger (心理穿孔 (メンタルスティンガー), Shinri Senkō (Mentaru Sutingā), lit. "Psychological Perforation") that used smartphone cameras to manipulate the moisture of the target's brain and control its fluid distribution and chemical secretion. Ayu has a grudge against Misaki because she is overtaken by her as the candidate for Level 5 and her wish to be saved by Tōma Kamijō from her suicide attempt is interrupted by her as well.

Iruka Yumiya (弓箭入鹿) is the younger sister of Rakko Yumiya and the captain of the school's archery club. She is a Level 4 esper with an ability called Wave Conductor (波動操作 (ウェイブコンダクター), Hadō Sōsa (Weibu Kondakutā), lit. "Wave Manipulation") that allowed her to control light and sound waves. Her right eye hidden by her peek-a-boo hairstyle contains a prism that could combine with her power to turn the light around her into lasers.

Iruka serves as one of the antagonists in A Certain Scientific Railgun: Astral Buddy manga series until she reconciles with Junko Hokaze, whom she revered since their first meeting back in the Ideal lab. She later teams up with Junko to foil Ayu Mitsuari's plan and save Senya Yūri. She eventually finds Gunha Sogīta a rival to her affection for Junko upon his arrival in their fight against Seigo Houjou.

Arei Hōjō (北条彩鈴, Houjou Arei) is a third-year technical exchange student and the younger sister of Seigo Hōjō. She is a Level 2 esper with an ability called Whisper Bell (感情音叉 (ウィスパーベル), Kanjō Onsa (Uisupā Beru), lit. "Emotional Tuning Fork") that allowed her to hear the target's emotions as sound to help her in identifying their location, direction, and distance. Arei's esper level is not within the school's admission requirements yet she is allowed to be enrolled because her power is considered to be a Level 3. She is also a ninja specialized in using kunai.

Komaki Makigami (牧上 小牧) is Kuroko Shirai's colleague at Judgment 3 Branch Office and a member of Misaki Shokuhō's clique. She is at least a Level 3 esper with an optical control-related ability that allowed herself and objects she preferred to become invisible to the naked eye but she needs to move quietly since making sounds can give away her location.

Kiyoshi Kessai (潔斎 雪紫) is a first-year student one year before the events of the main storyline and member of Reiri Hasekura's clique. She becomes the roommate of Mikoto Misaka, whom she addressed as 'Mikoto-chan', before Kuroko Shirai's eventual takeover.

Rurikakesu Shin'enkōji (神苑小路 瑠璃懸巣), or Ruri, is a second-year student one year before the events of the main storyline, who befriended Mikoto Misaka. She is known for her gyaru appearance and signature roundhouse kick to vending machines with a "Chaser!" shout, which inspired Mikoto to emulate in the following year.

Reiri Hasekura (支倉 冷理) is a third-year student one year before the events of the main storyline and the leader of one of the oldest of the "big three" cliques before the popularity of Misaki Shokuhō's clique.

Nagisa Mikagami (水鏡 凪紗) is a third-year student one year before the events of the main storyline and the leader of one of the "big three" cliques before the rise of Misaki Shokuhō's clique. She is at least a Level 3 esper with an oil control-related ability that allowed her to manipulate the target's oil content. Nagisa uses her ability to reward her clique members with the most contribution by manipulating their body fats to enhance their bust or slim them down.

Danshan Sha (沙 淡扇 (シア＝タンシャン), Shia Tanshan) is a second-year student one year before the events of the main storyline and the leader of the largest of the "big three" cliques before Misaki Shokuhō's clique takes over, earning her the nickname "Infirmary Empress". Her leadership helps the school to become one of the top five schools in Academy City.

Yuri Sakibasu (咲蓮誘璃, Sakibasu Yuri) is introduced in Toaru Kagaku no Railgun SS3 side story as a first-year student and member of Misaki Shokuhō's clique. She is at least a Level 3 esper with an ability called Carbon Search (有機探査 (カーボンサーチ), Yūki Tansa (Kābon Sāchi), lit. "Organic Exploration") that allowed her to precisely measure carbon isotopes of an object. Yuri is a talented violinist skilled in playing the genuine Stativarius that she obtained from an auction with the help of her power.

Voiced by: Shizuka Okohira (Index), Hitomi Nabatame (Railgun) (Japanese); Cynthia Cranz (English)

The Tokiwadai Dorm Supervisor (寮監, Ryōkan) is the unnamed housemaster of the dormitory that Mikoto Misaka and Kuroko Shirai resided. She strictly enforces the rules for all residences and has zero tolerance for violators, becoming feared among the students. She is also a volunteer caretaker for the Child Errors in Asunaro Park, where she showed her great affection towards children instead of her usual scary and fearsome nature.

Voiced by: Saitō Yuka (Japanese); Brianna Roberts (English)

Watanabe (綿辺) is an elderly teacher of the school and an acquaintance of Komoe. She prevents the festival committee from recruiting Mikoto Misaka to demonstrate in the opening ceremony of the Daihasei Festival because of the rumors she got involved. Watanabe is later brainwashed by Misaki Shokuhō to escort Mikoto in her clique.

Nagatenjōki Academy (長点上機学園, Nagatenjouki Gakuen) is one of the top five most prestigious schools in Academy City, where Accelerator attended. Unlike Tokiwadai Middle School, the school's admission is open for both espers and normal students with no powers. Last year, Nagatenjōki Academy defeated Tokiwadai Middle School at Daihasei Festival.

Voiced by: Ikumi Hayama (Japanese); Mariela Ortiz (English)

Shinobu Nunotaba (布束 砥信) is a former third-year high school student and a researcher who designed the machine called "Testament" for the Radio Noise Project (or Sisters Project). She adherently wears a gothic lolita clothes aside from her school uniform and lab coat. Shinobu has her trademark fish-like eyes but they do not appear in the anime adaptation of the character.

In the Sisters Arc, Shinobu is reassigned in the Level 6 Shift Project when Mikoto Misaka's clones from the Radio Noise Project were reused for it. After she conversed with one of the clones, Shinobu's perspective about their purpose changes. This causes her to quit the project and plan on stopping it by distributing cash cards in alleyways where the experiment would take place. Shinobu is last seen in this arc being taken down by Saiai Kinuhata when she infiltrated one of the laboratories involved in the project to install an emotion program throughout the Misaka Network.

In A Certain Scientific Railgun S anime-only Silent Party story arc, Shinobu is dragged in an organization called "STUDY" to create Febrie and Janie. She tells Febrie to look for Mikoto and helps her escape because of her trauma about her research being used for their creation.

Voiced by: Rie Tanaka

Mio Aizono (相園 美央) is the main antagonist of Toaru Kagaku no Railgun (PSP game) visual novel. She is a Level 4 esper with an ability called Military Oil (油性兵装 (ミリタリーオイル), Yusei Heisō (Miritarī Oiru), lit. "Oil-based Armament") that allowed her to manipulate oil and transform it into various weapons. Mio is a test subject of White Alligator, a project designed to make an esper move past the set limits of Academy City's Parameter List.

Voiced by: Fuyuka Ōura

Asako Jōnan (城南 朝来) is a former supervisor for the school's Power Curriculum Program and officer of Anti-Skill, who was introduced in the OVA episode of A Certain Scientific Railgun anime series. She is removed from her school position after she failed to develop a Level 5 esper. Asako plans an experiment that would test Electromasters' reaction to stimuli, which led Mikoto Misaka to become a victim.

Kirigaoka Girls' Academy (霧ヶ丘女学院, Kirigaoka Jogakuin) is an all-girls academy and one of the prestigious schools in Academy City, housing the middle school, high school, and college facilities. It is located near the Elementary Particle Engineering Laboratory at District 18. The school's admission is only opened to espers with rare and unique powers.

Voiced by: Kana Asumi (Japanese); Alexis Tipton (English)

Hyōka Kazakiri (風斬 氷華) is a mysterious top student and considered by Index as her first friend. She is an unidentified high-level esper with an ability called Counter Stop (正体不明 (カウンターストップ), Shōtai Fumei (Kauntā Sutoppu), lit. "Unknown Identity") but it only serves as a reference to her phantom-like appearance. Hyōka is discovered to be an aggregation of esper's AIM diffusion fields that they released unknowingly and referred to as the Key to the Imaginary Number District, a hidden realm formed from the same discharged AIM diffusion fields inside Academy City.

Hyōka officially debuts in the sixth volume of A Certain Magical Index light novel series when she met Index for the first time after she manifested herself in the real world. During the Academy City Invasion story arc, Hyōka is activated by Aleister Crowley into her artificial angel mode called "Fuse Kazakiri" (ヒューズ＝カザキリ, Hyūzu Kazakiri) as a countermeasure against Vento of the Front's rampage. She returns during the World War III story arc in the same mode to restrain Archangel Gabriel.

Voiced by: Harumi Sakurai (Japanese); Bryn Apprill (English)

Awaki Musujime (結標 淡希, Musujime Awaki) is a second-year high school student and the former guide for visitors inside the Windowless Building. She is a Level 4 esper with an ability called Move Point (座標移動 (ムーブポイント), Zahyō Idō (Mūbu Pointo), lit. "Coordinate Movement") that allowed teleportation of anyone or anything she pointed with her flashlight under a maximum weight of 4,520 kilograms (9,960 lb) to a maximum radius of 800 metres (2,600 ft). Awaki's ability is more powerful than Kuroko Shirai's but she is reluctant to teleport herself because of her past trauma when she accidentally teleported her leg inside a wall then its skins and muscles were torn up.

Awaki officially debuts in the eighth volume of A Certain Magical Index light novel series as the antagonist of the Tree Diagram Remnant story arc. She is hired by an outside organization called "Science Association" to retrieve the remnants of the Tree Diagram. Awaki tells Kuroko during their fight in a restaurant about her plan of testing animals to see if they can receive esper powers. She breaks down after Kuroko rebuked her reasoning in going with this plan and teleports a huge amount of mass on her. A fleeing Awaki is defeated by Accelerator as he destroys the suitcase containing the remnants. She is later coerced to join team GROUP for her captured comrades' safety. During the Battle Royale story arc, Awaki shockingly hears a plan of using her captured friends in District 10's Reformatory as a bargaining chip in exchange for her assistance to help the mercenaries infiltrate the Windowless Building. She then successfully defeats Megumi Teshio after she overcame her past trauma to use her power against her.

Voiced by: Miyu Tomita[15] (Japanese); Rachel Michelle Thompson (English)

Mitori Kōzaku (警策 看取, Kōzaku Mitori) is a former third-year middle school student who was nicknamed "Mi-chan" by Dolly. She is a Level 4 esper with an ability called Liquid Shadow (液化人影 (リキッドシャドウ), Ekika Hitokage (Rikiddo Shadō), lit. "Liquefaction Figure") that allowed free control of her preferred liquid metal with a specific gravity of 20 or higher. Mitori is a test subject of Clone Dolly Project, where she befriended Dolly. She soon finds out about her neglected health and tells a researcher about her threat of revealing the project to the public if no necessary treatment is done for Dolly. This is when she learned about the involvement of the Board of Directors on the project, causing her hatred towards them as she becomes the intermediary of MEMBER to use the team for her revenge against the board members. Near the end of the Daihasei Festival story arc, Mitori is helped by Misaki Shokuhō to reunite with Dolly.

Sakugawa Middle School (柵川中学校, Sakugawa Chūgakukō) is a co-ed middle school in Academy City located at District 7, where the two protagonists of A Certain Scientific Railgun manga and anime series were enrolled.

Voiced by: Aki Toyosaki (Japanese); Cherami Leigh (English)

Kazari Uiharu (初春 飾利, Uiharu Kazari) is a first-year student who shared the same class with Ruiko. She is a Level 1 esper with an ability called Thermal Hand (定温保存 (サーマルハンド), Teion Hozon (Sāmaru Hando), lit. "Fixed Temperature Preservation") that allowed her to keep basketball-sized objects she touched at their current temperature. Her power is only revealed to Erī. Kazari is a member of Judgment alongside Kuroko, where she displayed various computer-related skills such as hacking and surveillance. She wears a headband made of artificial flowers and craves sweet foods but she misses her chance to enjoy them as she is being called for work right away. Aside from her role as one of the protagonists of A Certain Scientific Railgun manga and anime series, Kazari also makes a cameo in A Certain Magical Index light novel and anime series.

Voiced by: Kanae Itō (Japanese); Brina Palencia (English)

Ruiko Saten (佐天 涙子, Saten Ruiko) is a first-year student and Kazari's close friend. She is a Level 0 esper yet she has shown a low-level version of Mitsuko's ability when she managed to move leaves on her palm by a small gust of wind after she used the Level Upper. Ruiko loses her power at the end of the Level Upper story arc but she shows no remorse anymore as she learns to appreciate her current state. She shamelessly teases Kazari by flipping her skirt in public and loves to read urban legends.

Ruiko has a small cameo in the fifteenth volume of New Testament: A Certain Magical Index light novel series when she dragged Kazari away from a mob for safety and passed by Tōma in a Bunny Grey costume.

Voiced by: Kana Hanazawa (Japanese); Carrie Savage (English)

Erī Haru'ue (春上 衿衣, Haru'ue Erī) is a Child Error and transfer student, who shared the same class as Kazari and Ruiko. She is a Level 2 esper with an ability called Telepathy (精神感応 (テレパス), Seishin Kannō (Terepasu), lit. "Mind Induction") that allowed her to telepathically communicate with other people and could be increased above her normal level when exposed to certain frequencies. Erī keeps a locket that contained a photo of Banri, who got separated from her after the latter was transferred to another Child Error facility. She can hear her beckoning voice in her mind, causing her to feel daze and a poltergeist-like phenomena around her area. In the Railgun S anime-only Poltergeist story arc, Erī is targeted by Therestina because of her potentiality to become a Level 6 esper. She is saved by Mikoto and her friends and later reunited with Banri.

Voiced by: Satomi Satō (Japanese); Luci Christian (English)

Banri Edasaki (枝先 絆理, Edasaki Banri) is a Child Error and transfer student who became Harumi's valued student. She possesses telepathic ability as she can telepathically communicate with Erī. Banri is in a coma when she was found by Harumi and Heaven Canceller. She is later saved by Mikoto and her friends from Therestina, who planned to use her and other children for an experiment involving Body Crystals. She regains consciousness and reunites with her teacher. During the Silent Party story arc, Banri moves in Erī's dormitory.

Voiced by: Junji Majima (Japanese); Eric Vale (English)

Daigo (大圄, Daigo) is Kazari and Ruiko's teacher, whom the Tokiwadai Dorm Supervisor has shown her affection. He facilitates the transfer of Erī to Kazari's dormitory. Daigo is also a volunteer caretaker for the Child Errors in Asunaro Park, where he fell in love with its principal named Kazuko Shigenomori.

Ryōran Maid School (繚乱家政女学校, Ryōran Kasei Jogakkō) is a girls' home economics school in Academy City where students received training to become maids.

Voiced by: Misato Fukuen (Japanese); Lara Woodhull (English)

Maika Tsuchimikado (土御門 舞夏, Tsuchimikado Maika) is Motoharu's stepsister whom he picked up from an orphanage outside Academy City. She is always seen wearing a maid attire and sitting atop of a cleaning robot that kept on spinning, but she shows no signs of dizziness. Maika has a friendly relationship with Tōma and Index and is also friends with Mikoto and Kuroko as she does maid-related work in Tokiwadai Middle School. Maika lives in her school dormitory but she usually stays in her stepbrother's room to serve him like cooking his meals. She likes to read books about an older brother falling in love with his younger sister.

Maria Kumokawa (雲川 鞠亜, Kumokawa Maria) is Seria's younger sister and Maika's classmate. She is a Level 2 esper with an ability called Violence Doughnut (暴風車軸 (バイオレンスドーナツ), Bōfū Shajiku (Baiorensu Dōnatsu), lit. "Windstorm Axle") that allowed an increase of her centrifugal force by 0.5 to 2 times. Maria is formally introduced in the fourth volume of the New Testament: A Certain Magical Index light novel series when she arrived in Baggage City to find her missing teacher. In Magic God Othinus story arc, she joins Tōma and others during the GREMLIN invasion of Tokyo to deal with Kagun.

Sekisho Junior High School (関所中学校, Sekisho Chūgakukō) is one of the middle schools located in Academy City.

Voiced by: Yukari Tamura (Japanese); Leah Clark (English)

Miho Jūfuku (重福 省帆, Jūfuku Miho) is a second-year student and an anime-only character introduced in the first season of A Certain Scientific Railgun anime series. She is a Level 2 esper with an ability called Dummy Check (視覚阻害 (ダミーチェック), Shikaku Sogai (Damī Chekku), lit. "Visual Inhibition") that allowed invisibility of her presence to other people's views, except for secondary sources (like mirrors) and technologies (like security cameras). Miho is known for her thick eyebrows hidden by her bangs that covered almost her left eye, which she ashamed. Her boyfriend ends his relationship with her because of her weird eyebrows and falls in love with a student from Tokiwadai Middle School, causing her grudge against Tokiwadai students. Miho uses the Level Upper to enhance her ability and begins her revenge by attacking them with a stun gun and drawing large eyebrows on them with a special marker. In the Level Upper story arc, she begins showing affection to Ruiko, who complimented her eyebrows, by writing letters for her.

Voiced by: Kana Ueda (Japanese); Trina Nishimura (English)

Mī Konori (固法 美偉, Konori Mī) is a high school student and branch chief of Judgment 177 Branch Office, where Kazari and Kuroko worked. She is a Level 3 esper with an ability called Clairvoyance (透視系能力 (クレアボイアンス), Tōshi Nōryoku (Kureaboiansu), lit. "See-through Ability") that allowed her to use X-ray vision for finding concealed weapons. Mī is a former member of Big Spider, which she considered as her haven, and shows affection towards its founder Wataru. His presumed death two years ago leads to her enlistment in Judgment.

Voiced by: Kengo Kawanishi (Japanese); Matt Shipman (English)[15]}}

Gunha Sogīta (削板 軍覇, Sogīta Gunha) is a high school student and the strongest Gemstone esper. He is Academy City's #7 Level 5 esper with an unknown ability yet he demonstrates ranges of skills such as Attack Crash (念動砲弾 (アタッククラッシュ), Nendō Hōdan (Atakku Kurasshu), lit. "Telekinesis Cannonball") that could unleash a blow powerful enough to destroy a mass of rubble and Aurora Guard (磁力戦線 (オーロラガード), Jiryoku Sensen (Ōrora Gādo), lit. "Magnetism Front") that could level electricity attacks. Gunha is seen wearing a white headband and his signature Rising Sun T-shirt.

Gunha is introduced in A Certain Magical Index SS2 light novel series when he saved a student named Yabumi Haratani from a group of Skill-Outs. He later rebukes Ollerus for being gutless after the latter defeated Misaka #10032 and other Sisters. In the Daihasei Festival story arc, Gunha and Tōma work together to save an unstable Mikoto from becoming a Level 6.

In New Testament: A Certain Magical Index light novel series, Gunha is present during the riot of "heroes" in the Learning Core and becomes concerned about the burning of trees caused by their actions. During the Magic God Othinus story arc, he receives an email with orders to kill Tōma and Othinus. Gunha ignores it as he finds it gutless.

Fremea Seivelun (フレメア＝セイヴェルン, Furemea Seivuerun) is an eight-year-old elementary school student and Frenda's younger sister. Her ipso facto ability is called Agitate Halation (人的資源 (アジテートハレーション), Jinteki Shigen (Ajitēto Harēshon), lit. "Human Resources") that could influence AIM diffusion fields to manipulate "heroes" and make them protect her at all cost, becoming a damsel in distress. Fremea is officially debuted in the first volume of New Testament: A Certain Magical Index light novel series when she became a target of an organization called "Freshmen". She is later rescued by Tōma, Accelerator, and Shiage, who became her guardian until Beetle 05 takes over.

Voiced by: Yoshitsugu Matsuoka

Kakeru Kamisato (上里 翔流, Kamisato Kakeru) is a "normal high school boy" who originally lived in an ordinary town outside Academy City. He has a power residing in his right hand called World Rejecter (理想送り (ワールドリジェクター), Risō Okuri (Wārudo Rijekutā), lit. "Ideal Exile") that allowed banishment of individuals with conflicting desires to a "new world". He arrives in Academy City to seek revenge against Magic Gods who gave him this power and finds Tōma whom he could share his circumstances.

Kakeru is formally introduced in the fourteenth volume of New Testament: A Certain Magical Index light novel series when he met Tōma and Othinus, who both went grocery shopping. Their meeting is interrupted by fighting between the Birdway sisters over their resolution on the Sample Shoggoth infection. In the Salome story arc, he enrolls in an unnamed high school that Tōma's class used as a temporary facility due to their school's destruction from the hands of Magic God High Priest. Kakeru is later banished to the "new world" after Yuītsu severed his right hand and used it against him. He is eventually rescued by Tōma, Fran, and Luca, and reunites with his Kamisato Faction before they prepare to leave the city.

Voiced by: Aya Endō (Japanese); Kara Edwards (English)

Tsuzuri Tessō (鉄装 綴里, Tessō Tsuzuri) is a teacher and member of Anti-Skill, who often partnered with Aiho. She has wavy, green hair that she tied in a ponytail and wears eyeglasses. Tsuzuri shows clumsiness at work, which resulted in her being reprimanded by Aiho. She is a fan of the arcade beat 'em up game titled "Gekisho".

Skill-Out (武装無能力集団 (スキルアウト), Munouryoku Shuudan (Sukiru Auto), lit., "Armed Powerless Group") is an armed group of Level 0s who often used various means of fighting espers to compensate their lack of powers.

Voiced by: Kenta Miyake (Japanese); Patrick Seitz (English)

Ritoku Komaba (駒場 利徳, Komaba Ritoku) is the leader of Skill-Out in District 7 and the guardian of Fremea before his death at the hands of Accelerator. He is well-known for his gorilla-like appearance and wears a black leather jacket. He is generally an honorable person as he encourages his fellow Skill-Outs to not engage in prostitution as a source of money and violently attack espers, except for those who actively misused their powers.

In the Skill-Out story arc, Ritoku devises a plan to target espers on his hit list by disabling Academy City's communication network because of an increased number of esper's unreasonable attacks against Level 0s. This catches the attention of the Board of Directors, who tasked Team GROUP to eliminate him and his Skill-Out operation.

Hanzō Hattori (服部 半蔵, Hattori Hanzō) is the current leader of Skill-Out and a ninja descendant. During the Battle Royale story arc, he saves Shiage from being beaten by a group of thugs and hands him over a gun. Hanzō later meets him again, who defeated Shizuri in a plant refinery facility using that gun and invites him back to Skill-Out as their rightful leader. In the first volume of the New Testament: A Certain Magical Index light novel series, he takes over Ritoku's role as Fremea's guardian and protects her against Freshmen's attacks.

Voiced by: Katsuyuki Konishi (Japanese); Brad Hawkins (English)

Wataru Kurozuma (黒妻 綿流, Kurozuma Wataru) is an anime-only character introduced in the first season of A Certain Scientific Railgun anime series, who founded a Skill-Out faction called "Big Spider". He is well-known for his large spider tattoo on his back's right side hidden by his black leather jacket, and always seen carrying and drinking Musashino Milk. Wataru is presumed dead for two years after he tried to save Tsuguo but he is alive and has been incarcerated for that time. Upon his release, he discovers that his group became a ruthless gang and plans to dissolve it.

Voiced by: Makoto Yasumura (Japanese); Jeremy Inman (English)

Tsuguo Hebitani (蛇谷 次雄, Hebitani Tsuguo) is the last leader of Big Spider before its disbandment. He takes over Wataru's name and role after his presumed death, and allows Big Spider to stock up weapons and attack innocent people, straying from the ways of the group's original incarnation. Tsuguo also acquires a machine that could disrupt espers' powers called "Capacity Down".

Sisters (妹達 (シスターズ), Imōto-tachi (Shisutāzu), lit. "Little Sisters") is the collective term for Mikoto's clones produced by the Radio Noise Project (also known as Sisters Project). They are Level 2 or 3 espers with an ability called Radio Noise (欠陥電気 (レディオノイズ), Kekkan Denki (Redio Noizu), lit. "Flawed Electricity") that allowed them to generate at least 50,000 V of electricity but it cannot track electrons, therefore they use special goggles instead. This ability also turns their brainwaves into electric signals, allowing them to share their thoughts and memories within their communication network called "Misaka Network". The Sisters are quiet and emotionless as they speak monotonously in third person narrative while ending their sentences with a description of themselves. Since the termination of their projects, the clones eventually develop self-esteem and individuality and begin showing feelings towards Tōma as they share their memories with him throughout the network.

The Sisters are originally produced as efficient Level 5 combat clones for the military but the project result shows that they only achieved Level 2 or 3 instead. The clones are then reused in the Level 6 Shift Project as experimental subjects needed for Accelerator's shift into Level 6 by killing them. In the third volume of A Certain Magical Index light novel series, 10,031 clones have been killed in the experiment until Tōma and Mikoto intervene to stop the project, saving the last subject (Misaka #10032) before its termination. At the end of the Sisters story arc, the remaining 9,959 clones are sent to research facilities around the world for the readjustment of their body's life span while 10 clones stay in Academy City under Heaven Canceller's care.

Voiced by: Nozomi Sasaki (Japanese); Brittney Karbowski (English)

Misaka 10032 (ミサカ10032号) is the 10,032nd clone of Sisters and the most prominent clone to appear in the series. She is the second clone that Tōma met, whom he called as "Misaka Imōto" (御坂妹, Misaka's little sister), and has moments with him since then. She has soft spot for cats as she can pet a black kitten despite emitting EM waves from her body, which scared off them.

During the Sisters story arc, Misaka 10032 is the latest clone targeted by Accelerator for his experiment but their fight is interrupted by Tōma. She then provides him assistance for defeating Accelerator after his words about self-worth reflected her. After the termination of the Level 6 Shift Project, Misaka 10032 becomes one of the 10 clones who remained in Academy City for body readjustment. She begins showing her feelings towards Tōma and later receives a heart-shaped necklace from him to differentiate her from Mikoto, which she greatly treasured.

Voiced by: Rina Hidaka (Japanese); Brittney Karbowski (English)

Misaka 20001 (ミサカ20001号) / Last Order (ラストオーダー, Rasuto Ōdā) is the 20,001st clone of Sisters and administrator of the Misaka Network. Her name is written as "Uchidome" (打ち止め) that meant "The End" because she is designed as the fail-safe for the clones in the event they lose control. Her composition is different from other clones because she appears as a 10-year old girl and shows emotions that she intercepted from Shinobu's installation of emotion program throughout the network. She speaks the same way as her older clones but she mentions "Misaka" twice instead.

In the Three Stories story arc, Last Order follows Accelerator as he goes back to his apartment. She is infected by a virus inputted by Ao but she is later saved by Accelerator. In the Academy City Invasion story arc, she and Accelerator are discharged from Heaven Canceller's hospital, and put under Aiho's care. After she played tag with Misaka #10032 over her goggles, Last Order is abducted by Amata and is inputted with another virus that would activate Hyōka's angel mode. During the DRAGON story arc, she falls ill after Aiwass manifested in front of Team GROUP. Accelerator and Last Order then arrive in Russia to find Index for a cure she used during Vento's attack.

Voiced by: Nozomi Sasaki (Japanese); Brittney Karbowski (English)

Misaka 9982 (ミサカ9982号) is the 9,982nd clone of Sisters and the first clone that Mikoto met. She shows curiosity towards the outside world as she walks around the city, which led her to run into Mikoto. Upon meeting her, Misaka 9982 acts snarky in front of Mikoto, but she later bonds with her and receives a Gekota badge from her. Sadly, their first meeting will be the last one as she is killed by Accelerator in the experiment while holding on to the very first gift she received.

Voiced by: Ai Kakuma (Japanese); Brittney Karbowski (English)

Misaka Worst (ミサカワースト, Misaka Wāsuto) is the only clone produced by the Third Season Project, which was sent by Academy City in Russia to kill Last Order. Her name is written as "Bangai Kotai" (番外個体) that meant "Extra Individual". Her ability is similar to the previous generation of Mikoto's clones but she is ranked as Level 4. Misaka Worst's appearance is slightly an older version of Mikoto with a dark personality. During the World War III story arc, she becomes Accelerator's ally after their first meeting and battle in Russia. In New Testament: A Certain Magical Index light novel series, Misaka Worst starts to live in Aiho's apartment and is seen wearing an áo dài given by Kikyō.

Voiced by: Konomi Kohara (Japanese); Brittney Karbowski (English)

Dolly (ドリー, Dorī) is the prototype for Mikoto's clones before their mass production. She befriends Mitori and Misaki in the building that held both the Clone Dolly Project and Exterior Project but their bonding is interrupted by her sudden death. They reunite at the end of the Daihasei Festival story arc after Misaki discovered that Dolly's original body only expired and her memories were transferred in a new clone body.

The Board of Directors consists of twelve people who held absolute authority in Academy City, with the Board Chairman ruling them. They govern the city's daily activities and contribute to the research, development, and welfare of its citizens.

Voiced by: Toshihiko Seki (Japanese); Chuck Huber (English)

Aleister Crowley (アレイスター・クロウリー, Areisutā Kurourī) is a magician, based on the real-life occultist of the same name, and the founder of Academy City after he left the world of magic. He resides in the Windowless Building and is confined upside down inside a life-support tube created by Heaven Canceller. As the Board Chairman, he has the final say for the city's internal affairs but he usually leaves the citizen's welfare to the twelve board directors. Aleister is considered the greatest magician in history, where more than half of all modern sorcerers were affected by his established theories and two-fifths of them were direct followers of his ways. He has his primary combat spell called Spiritual Tripping (霊的蹴たぐり, Reiteki Ketaguri) that allowed the connection between him and the target to manifest illusionary weapons in their mind, which would have the same effects as the real one, and possesses a magic staff as his signature weapon called "Blasting Rod" (衝撃の杖 (ブラスティングロッド), Shōgeki no Tsue (Burasutingu Rōdo), lit. "Cane of Impact") that could amplify a magic's effect ten times from what the target would assume.

Aleister's backstory is introduced in the eighteenth volume of New Testament: A Certain Magical Index light novel series when he became a member of the Golden Dawn magic cabal, and his membership there led to his hatred towards magic and the eventual establishment of the science side.

Voiced by: Mika Doi (Japanese); Linda Young (English)

Monaka Oyafune (親船 最中, Oyafune Monaka) is a member of the Board of Directors and Suama's mother. She is possibly the only board director who showed affection towards Academy City's students, unlike the other members that could only see them as experiment subjects. Monaka seeks Tōma's help in ending the worldwide anti-Academy City protests and later gets shot by Motoharu as a means of covering up her illicit meeting with him. In the Battle Royale story arc, she becomes the target of the assassination attempt orchestrated by Team SCHOOL.

Voiced by: Yūya Murakami (Japanese); Randy Pearlman (English)

Thomas Platinaburg (トマス・プラチナバーグ, Tomasu Purachinabāgu) is a member of the Board of Directors and the financier for Team ITEM. In the Academy City Invasion story arc, he is gravely injured by Accelerator who sought revenge against the higher management responsible for kidnapping Last Order. In the DRAGON story arc, Thomas hires Stephanie to kill Accelerator but he is killed by her instead when he mentioned using Chimitsu as a bargaining chip.

Voiced by: Ryōsuke Kanemoto (Japanese); Doug Jackson (English)

Shiokishi (潮岸, Shiokishi) is a member of the Board of Directors and oversees military research, development, and production. He is always seen wearing a HsPS-15 Powered Suit because he feels uneasy without it. In the DRAGON story arc, Shiokishi attempts to eliminate Team GROUP for their investigation of DRAGON, but his plan is thwarted by the efforts of the team and Monaka. He later loses consciousness when Aiwass manifested in front of him and GROUP during their failed negotiation.

Voiced by: Hinata Tadokoro (Japanese); Brian Mathis (English)

Rizō Nakimoto (亡本 裏蔵, Nakimoto Rizō) is a member of the Board of Directors and the financier for Disciplinary Action (DA). He manages Academy City's food supply, including the farm buildings, and contributes to the city's defensive forces to protect its infrastructure. Rizō is introduced as an antagonist in A Certain Scientific Accelerator manga and anime series.

Tsugutoshi Kaizumi (貝積 継敏, Kaizumi Tsugutoshi) is a member of the Board of Directors whom Seria worked for as his advisor. He is instrumental in rescuing Gemstones from around the world and bringing them inside Academy City but he fails to cease the Agitate Halation Project until Tōma intervenes.

Hisako Yakumi (薬味 久子, Yakumi Hisako) is a member of the Board of Directors and an expert in the medical field. She is brainwashed by Yuītsu to have the same intellectual curiosity as hers, which led to her development of the Agitate Halation Project that would help her enter the realm of Hyōka and Aiwass, and beyond. Hisako disguises the project under the pretext of purging the "heroes" who became a nuisance in Academy City and begins observing Fremea as the "protection target" that would "agitate" the heroes in killing each other to protect her at all cost. During the Agitate Halation story arc, she becomes an AIM thought being with the help of the fluid mechanics-based computer called "Shading Computer" and later gets destroyed by Tōma's Imagine Breaker. Hisako's remaining existence is manifested using the scent emitted by the man-eating cockroaches but she is left on hiatus after Fräulein ate 99% of her form.

Norito Neoka (根丘則斗, Neoka Norito) is a member of the Board of Directors and former rescue squad elite. He is introduced in the first volume of Genesis Testament: A Certain Magical Index light novel series when he instructed Hoshimi Madono to abduct Last Order so that he could use her as a bargaining chip against the new Board Chairman Accelerator's plan of eliminating Academy City's dark side.

The Kihara family (木原一族, Kihara Ichizoku) is a group of scientists who led twisted human experiments in the name of science.

Voiced by: Keiji Fujiwara (Japanese); Marcus D. Stimac (English)

Amata Kihara (木原 数多, Kihara Amata) is a researcher assigned as the mentor for Accelerator and the commander of the black ops unit called "Hound Dog". He has a tattoo on the left side of his face and wears mechanical gloves. In the Academy City Invasion story arc, Amata is reunited with Accelerator when Hound Dog was tasked to abduct Last Order. The two engage in a fight until Accelerator kills him with his manifested black wings that sent him to the sky, turning him into a plasma.

Voiced by: Binbin Takaoka (Japanese); Charlie Campbell (English)

Gensei Kihara (木原 幻生, Kihara Gensei) is an elderly scientist specialized in neurology, and antagonist introduced in A Certain Scientific Railgun manga and anime series. He is Harumi's superior who conducted the inhumane experiment involving her Child Error students, resulting in their coma. His research on Body Crystals continues later in the series when he involved Mikoto in his experiment that would turn her into a Level 6 esper. However, his plan is thwarted with the efforts of Tōma, Misaki, Gunha, Kuroko, Kazari, and Ruiko. His current status is unknown after he was defeated by Misaki inside the Exterior building.

Voiced by: Sayaka Ohara (Japanese); Colleen Clinkenbeard (English)

Therestina Kihara Lifeline (テレスティーナ・木原・ライフライン, Teresutīna Kihara Raifurain) is Gensei's granddaughter, whom he used as his first test subject for his research on Body Crystals, and the leader of Academy City's SAR unit called "Multi Active Rescue" or MAR. She is seen carrying a cylindrical tube of candies that she used for her guessing games with others and well-known for her exclusive pink-camouflaged HsPS-15 Powered Suit. In the Poltergeist story arc, Therestina leads MAR in investigating Poltergeist-related incidents along with Anti-Skill and Judgment. She later tricks Mikoto and Harumi into allowing her to take the latter's comatose students under her custody for her actual goal of using them as test subjects of the Body Crystals experiment that would make Erī a Level 6 esper. Her plan is foiled by Mikoto and her friends, and she is later arrested by Anti-Skill.

Nayuta Kihara (木原 那由他, Kihara Nayuta) is introduced in A Certain Vending Machine's Proof of Existence mini-novel by Ryōgo Narita as Gensei's granddaughter and a member of Judgment 49 Branch Office. She is a cyborg, despite looking like an ordinary elementary school girl, because her grandfather experiments on her, and an esper with an ability that allowed her to see and feel the flow of AIM diffusion fields. Nayuta is one of the Kiharas who cared for Child Errors as she is friends with Harumi's students and donates her earned money from experiments she participated into Child Error facilities, including Asunaro Park.

Kagun Kihara (木原加群, Kihara Kagun) is a scientist specialized in NDE-related research and magician of GREMLIN known as "Bersi". He is seen wearing a white coat and helmet to hide his appearance. Kagun resigns from being a researcher after he questioned the morality of his experiments and becomes a teacher instead. However, he decides to quit teaching for almost 3 years after he killed a young man who attacked a group of his students, whom Maria was a part of. In the Baggage City story arc, Kagun dies after he successfully killed Byōri Kihara who corrupted the young man, thus completing his revenge on her.

Yuītsu Kihara (木原唯一, Kihara Yuītsu) is the negotiator sent in Baggage City by Academy City to deal with the Science Guardian and a researcher who influenced Hisako in developing the Agitate Halation Project. She is always seen taking care of Nōkan, whom she addressed as "sensei". Yuītsu has a grudge against Kakeru because she learns about his involvement in Nōkan's death, causing the citywide Elements attacks. In the Kamisato Rescue story arc, her fate becomes unknown when her controlled Kamisato Faction turned against her after Tōma, Fran, and Luca rescued Kakeru from his banishment.

Voiced by: Show Hayami

Nōkan Kihara (木原脳幹, Kihara Nōkan) is a golden retriever and the wielder of the anti-magic machine called "Anti-Art Attachment". He is seen wearing a collar and backpack installed with robotic arms for him be able to smoke Cuban cigar. Nōkan has an understanding of magic due to his ties with Aleister. In the Coronzon story arc, he is revived by Heaven Canceller and later accompanies him in Egypt for their mission of creating a body for Aleister's daughter named Lillith.

SCHOOL (スクール, Sukūru) is one of the dark side organizations in Academy City, which became responsible for stealing the Tweezers that served as a MacGuffin in A Certain Magical Index light novel series.

Voiced by: Matsukaze Masaya (Japanese); Daman Mills (English)

Teitoku Kakine (垣根 帝督, Kakine Teitoku) is the leader of SCHOOL. He is Academy City's #2 Level 5 esper with an ability called Dark Matter (未元物質 (ダークマター), Migen Busshitsu (Dāku Matā), lit. "Unknown Matter") that allowed him to create and control an unknown matter unbounded by laws of physics. Teitoku is Aleister's spare plan if Accelerator would not meet his expectations, which he found undesirable. He later sparks a revolution by orchestrating an assassination attempt on Monaka, which would disrupt the security in Elementary Particle Engineering Laboratory that housed the Tweezers. Teitoku plans on using it to grab a minuscule machine called "UNDER_LINE" that served as Aleister's sole method of collecting information while inside the Windowless Building, which would help him contact the Board Chairman. However, he decides to kill Accelerator instead because he has not gained any leverage that would serve as a bargain for Aleister. Teitoku then tortures Kazari for information about Last Order's location when Accelerator showed up. The two engage in a fight, where both became awaken by their hidden powers, until Accelerator hardly beats Teitoku, ripping apart most of his body. His brain is later preserved in Dark Legacy, a tool created by Heaven Canceller which could rapidly reproduce cells to keep anything alive.

Teitoku returns in the sixth volume of the New Testament: A Certain Magical Index light novel series when he managed to recreate his body. In the Ichihanaran Festival story arc, he is requested by Yuītsu to capture Fräulein. He summons Dark Matter-made Japanese rhinoceros beetles called "White Beetle" to hunt down her while he fights Accelerator for his revenge. However, one of the White Beetles loses its programmed command because of Rikō's AIM Stalker ability and starts to take over the system, becoming the new Teitoku named "Beetle 05" that possessed a caring personality. The original Teitoku is taken by Ollerus, who disguised as Thor, for the creation of Lance of Gungnir on GREMLIN.

Voiced by: Shiori Izawa (Japanese); Marti Etheridge (English)

Kaibi Gokusai (獄彩 海美, Gokusai Kaibi) is one of the operatives of SCHOOL known as the "girl in the dress". She is an esper with an ability called Measure Heart (心理定規 (メジャーハート), Shinri Jōgi (Mejā Hāto), lit. "Mind Ruler") that allowed regulation of the distance between people's hearts, making her relationship to the target affectionate or distant. Kaibi participates in enjo kōsai but she clarifies that she only accompanied her clients without sexual involvement. In the Battle Royale story arc, she chases Shiage after he was left behind by Shizuri and Rikō to pursue Teitoku, and loses track of him but she finds Frenda instead. In the DRAGON story arc, Kaibi becomes a member of a new team formed from the remnants of dissolved dark side organizations. She leads the remaining Hound Dogs to hunt down Shiage upon the orders of Aleister. Kaibi returns in the third volume of Genesis Testament: A Certain Magical Index light novel series when she reunited with an imprisoned Shiage after she voluntarily surrendered in an Anti-Skill station because she finds it safer while Anti-Skill commences Operation Handcuffs against Academy City's dark side.

Voiced by: Yuya Hirose

Banka Yobō (誉望 万化, Yobō Banka) is an operative of SCHOOL known for his moniker "Boy with goggles" (ゴーグルの少年, Gōguru no Shōnen). He is a Level 4 esper with an ability similar to psychokinesis. He is always seen wearing a ring-shaped metallic headgear with extended wires on its outer edge. In the Battle Royale story arc, Banka is killed by Shizuri during their confrontation in Elementary Particle Engineering Laboratory.

Voiced by: Tarō Kiuchi (Japanese); Phil Parsons (English)

Chimitsu Sunazara (砂皿 緻密, Sunazara Chimitsu) is a sniper of SCHOOL and Stephanie's close friend. He is known for using a magnetic sniper rifle produced by Academy City called "MSR-001". In the Battle Royale story arc, Chimitsu is hired by SCHOOL as their replacement for their previous dead sniper (Rakko) and tasked to assassinate Monaka. He later joins Teitoku and Kaibi in infiltrating ITEM's hideout, where he provided sniping support. Chimitsu's sniping location is destroyed by Saiai's handheld anti-tank missile warhead. In the DRAGON story arc, he is revealed to be alive after he survived the blast but he is in a coma since then.

Voiced by: Sayumi Suzushiro (Japanese); Emi Lo (English)

Rakko Yumiya (弓箭 猟虎, Yumiya Rakko) is a sniper of SCHOOL and student of Private Shidarezakura Academy. Her sniping method includes hiding two collapsible sniper rifles inside her uniform's sleeves and using her nose to smell the target's blood drip and follow their trail. In the Dream Ranker story arc, Rakko targets Frenda and Ruiko for the latter's purchased Indian Poker card that might contain information about the Tweezers. However, she is defeated by Frenda and her mouth is blown up by her bombs. Rakko later reveals that she survived with the help of Banka and is seen wearing a prosthetic mouth. She vows to take revenge on Frenda but she is already taken out by ITEM before the Battle Royale story arc after Kakine and the girl in the dress agreed that she had outlived her usefulness.

ITEM (アイテム, Aitemu) is one of the dark side organizations in Academy City tasked to keep the Board of Directors in check. The team is the only one of the organizations involved in the Battle Royale story arc to remain active after World War III.

Voiced by: Ami Koshimizu (Japanese); Lydia Mackay (English)

Shizuri Mugino (麦野 沈利, Mugino Shizuri) is the leader of ITEM. She is Academy City's #4 Level 5 esper with an ability called Meltdowner (原子崩し (メルトダウナー), Genshi Kuzushi (Merutodaunā), lit. "Atom Breaker") that allowed conversion of electrons into an unstable destructive matter for her to fire high-speed beams of light and make an energy shield. Shizuri is capable of showing kindness to her teammates and protecting them from the dangers they got involved in, but she usually looks down upon low-level espers and does not mind eliminating people who got in her way, regardless of whether they are an ally or enemy.

In the Sisters story arc, Shizuri and her team are hired to defend the remaining facilities involved in the Level 6 Shift Project from Mikoto's attacks. She arrives in time just as Mikoto interrogates Frenda. The two Level 5 espers engage in a fight until Shizuri is defeated by Mikoto with the help of Frenda's leftover explosive items. In the Battle Royale story arc, Shizuri and her team discuss the recent assassination attempt on Monaka. She deduces that SCHOOL used this event as a diversion for their actual goal. Shizuri receives a call from their team's liaison and is tasked to deal with the Virus Isolation Center's hacking, but she informs her that she would destroy SCHOOL instead. Shizuri and her team arrive in the Elementary Particle Engineering Laboratory, where she killed Banka and confronted Teitoku. She then gives chase to a fleeing Teitoku, who successfully stole the Tweezers, but she loses track of him. Shizuri is later attacked by him inside ITEM's hideout. A defeated Shizuri kills Frenda for revealing the team's lair to SCHOOL. As she drags Frenda's bloody upper body, a vengeful Shizuri demands Shiage to hand over Rikō so that she could track Teitoku by her power. She then fights him for stealing the Body Crystals needed for enabling Rikō's power until she loses her right eye and left arm, and gets shot by him. In the DRAGON story arc, Shizuri survives the predicament and receives treatment with the help of Dark Legacy. She then confronts Shiage for the second time in District 23's airport but she is still defeated by him. Due to trauma and psychological breakdown, she develops a disturbing sense of twisted love for him and declares that she would castrate him as a sign of affection before letting him escape Academy City via a supersonic passenger plane. In the World War III story arc, Shizuri intercepts Shiage in Russia and overdoses herself with Body Crystals as she feels being defeated by him for the third time. She finally reconciles with him and Rikō after she was moved by Shiage's words about how he wanted the old Shizuri who cared for her teammates to be back.

In New Testament: A Certain Magical Index light novel series, Shizuri reforms ITEM and restores her relationship with other remaining members.

Voiced by: Aya Suzaki (Japanese); Megan Shipman (English)

Rikō Takitsubo (滝壺 理后, Takitsubo Rikō) is an operative of ITEM and Shiage's girlfriend. She is a Level 4 esper with an ability called AIM Stalker (能力追跡 (AIMストーカー), Nōryoku Tsuiseki (AIM Sutōkā), lit. "Ability Tracker") that allowed the recording of espers' AIM diffusion fields for her to track their location. Her ability requires Body Crystals for its activation which prevented her from becoming Academy City's #8 Level 5. Rikō is always seen wearing a pink tracksuit that served as her casual wear and sleepwear.

In the Battle Royale story arc, Rikō becomes the target of SCHOOL because they see her as a threat to their plans. She pushes Shiage inside an elevator to save him from Teitoku's attack but she suffers damage in her body as she uses her ability against him. She is found unconscious by a returning Shiage and brought to Aiho for safety as he lures Shizuri away from her. In the World War III story arc, Rikō and Shiage arrive in Russia where she received partial treatment from Elizalinan magicians. Her ability is further revealed by the arrival of ITEM's liaison to have the potential in altering an esper's Personal Reality, which could change their power level or give a non-powered esper with an ability.

In New Testament: A Certain Magical Index light novel series, Rikō becomes a member of the reformed ITEM and reunites with Shizuri, while her relationship with Shiage improves as they go on date and take care of Fremea like a parent. In the Ichihanaran Festival story arc, her ability helps one of the White Beetles to become free of Teitoku's control and take over him as the new one.

Voiced by: Chinatsu Akasaki (Japanese); Apphia Yu (English)

Saiai Kinuhata (絹旗 最愛, Kinuhata Saiai) is an operative of ITEM and a test subject of the Dark May Project. She is a Level 4 esper with an ability called Offense Armor (窒素装甲 (オフェンスアーマー), Chisso Sōkō (Ofensu Āmā), lit. "Nitrogen Armor") that allowed her to automatically create a nitrogen-made barrier around her body. She is known for adding 'super' (超, chou) in her sentences and loves watching B or C movies.

In the Sisters story arc, Saiai subdues Shinobu as she attempts to install an emotion program throughout the Misaka Network. In the Battle Royale story arc, she helps Shiage and Rikō to escape SCHOOL's attack in their hideout and destroys Chimitsu's sniping position with her handheld anti-tank missile warhead but she is later knocked down by Teitoku. In the DRAGON story arc, Saiai becomes a target of revenge by Stephanie for her role in Chimitsu's condition. She manages to defeat her with the help of a reserved liquid nitrogen canister that she used for her ability.

In the New Testament: A Certain Magical Index light novel series, Saiai becomes a member of the reformed ITEM and reunites with Shizuri.

Voiced by: Maaya Uchida (Japanese); Leah Clark (English)

Frenda Seivelun (フレンダ セイヴェルン, Furenda Seivuerun) is an operative of ITEM and Fremea's older sister. She is the only member of the team who could defeat opponents without any esper ability as she uses explosive items like dolls stuffed with bombs and explosive tapes, and hand-to-hand combat. Frenda is Norwegian and loves to eat mackerel because it reminds her of her hometown.

In the Sisters story arc, Frenda fights Mikoto inside one of the facilities she is tasked to protect from her infiltration but she is later defeated. In the Battle Royale story arc, she is captured by SCHOOL and forced to reveal ITEM's hideout with the help of Kaibi's ability. Frenda is later killed by Shizuri for her betrayal. Before this event, she becomes friends with Ruiko for their love of mackerel and gets invited by her over dinner, but she is already dead by the time their scheduled dinner arrives.

In New Testament: A Certain Magical Index light novel series, Frenda's grave is visited by Shizuri at District 10.

MEMBER (メンバー, Menbā) is one of the dark side organizations in Academy City tasked to perform odd jobs for the Board Chairman. The team is considered Aleister's "loyal dogs".

Voiced by: Ryō Sugisaki (Japanese); Ben Bryant (English)

The Professor (博士, Hakase) is the unnamed elderly leader of MEMBER. He equips Mimosa, a weapon containing microscopic-sized reflective alloy that could decompose organic matter. He loves numerical expressions and finds beauty within them. He is aware of the existence of magic because one of his teammates (Xochitl) is a magician. In the Battle Royale story arc, the Professor is killed by Teitoku when he confronted him over the stolen Tweezers.

Voiced by: Daichi Hayashi (Japanese); Dallas Reid (English)

Yoshio Baba (馬場 芳郎, Baba Yoshio) is an operative of MEMBER specialized in hacking and surveillance. He supports the Professor by using animal-shaped robots while inside an emergency shelter. He has a keen insight of his opponent's esper power and uses it to his advantage in fighting them. In A Certain Scientific Railgun manga and anime series, Yoshio attempts to obtain one of the Sisters (Misaka #10032) but his plan is thwarted by Mitsuko, Kinuho, Ma'aya, and Mikoto. In the Battle Royale story arc, he watches the defeat of the Professor and Saraku on-screen, and later gets trapped inside the shelter as the outside area is being flooded.

Voiced by: Daisuke Takahashi (Japanese); Alejandro Saab (English)

Saraku (査楽, Saraku) is an operative of MEMBER. He is a Level 3 esper with an ability dubbed by Accelerator as Kill Point (死角移動 (キルポイント), Suhikaku Idō (Kiru Pointo), lit. "Blind-spot Movement") that used an individual as a reference point for his teleportation, teleporting himself behind the target. In the Battle Royale story arc, Saraku is defeated by Accelerator as he protects the District 23's parabolic antenna. In A Certain Scientific Railgun manga and anime series, he meets Pierce and praises his S-ranked Indian Poker cards.

BLOCK (ブロック, Burokku) is one of the dark side organizations in Academy City tasked to keep an eye on the level of cooperation between the city and friendly outside institutions.

Voiced by: Ken Mizukoshi (Japanese); Chris Rager (English)

Tatsuhiko Saku (佐久 辰彦, Saku Tatsuhiko) is the leader of BLOCK. He plans on bringing 5,000 foreign mercenaries inside Academy City to lead them in his attack against Aleister, whom he showed hatred. In the Battle Royale story arc, Tatsuhiko is rendered unconscious by Megumi after the two debated over his treatment of hostages inside District 10's Reformatory.

Voiced by: Chitose Morinaga (Japanese); Jeannie Tirado (English)

Megumi Teshio (手塩 恵未, Teshio Megumi) is an operative of BLOCK and a former officer of Anti-Skill. She joins the team to know if Aleister has control over the children's fate in the dark side as she sympathizes with them. In the Battle Royale story arc, she is defeated by Awaki inside District 10's Reformatory after the latter overcame her trauma of using her ability.

Yamate (山手, Yamate) is an operative of BLOCK. He is part of the squad that infiltrated the Management's apartment to prevent leakage of SCHOOL's plan. Yamate is later killed by Etzali and his appearance is used by him as his disguise to infiltrate the team.

Voiced by: Tomoko Tsuzuki (Japanese); Sarah Wiedenheft (English)

Tetsumō (鉄網, Tetsumō) is an operative of BLOCK. She is an esper with an ability called Skill Polygraph (意見解析 (スキルポリグラフ), Iken Kaiseki (Sukiru Porigurafu), lit. "Comment Analysis") that allowed verification of the target's profile while holding their hands. In the Battle Royale story arc, Tetsumō's right-hand gets burned after she held hands with a BLOCK operative that Etzali used as his diversion to avoid being detected by her.

Scavenger (スカベンジャー, Sukabenjā) is one of the dark side organizations in Academy City tasked for clean-up and disposal on behalf of the Board of Directors. They make appearances in the manga and anime series A Certain Scientific Accelerator and A Certain Scientific Railgun.

Voiced by: Akane Fujita (Japanese); Felecia Angelle (English)

Rita Īzumi (飯棲リタ, Īzumi Rita) is the leader of Scavenger who went by her nickname "Leader" (リーダー, Rīdā). She is a Level 3 esper with an ability called Predator (鳥瞰把握 (プレダター), Chōkan Hāku (Puredatā), lit. "Bird's-eye Grasp") that allowed dispersion of eye-like shapes throughout the sky by covering her one eye to locate the target, regardless of their distance. Rita is always seen wearing a surgical mask with dark, crossed hands printed on it.

Voiced by: Nozomi Nishida (Japanese); Julie Shields (English)

Itsuki Yakumaru (薬丸医月, Yakumaru Itsuki) is an operative of Scavenger. She is an esper with an ability called Mix Master (液比転換 (ミックスマスター), Eki-hi Tenkan (Mikkusu Masutā), lit. "Liquid Ratio Conversion") that allowed her to separate and mix liquids by manipulating their specific gravity.

Voiced by: Aoi Koga (Japanese); Sarah Wiedenheft (English)

Naruha Sakuragi (作楽木ナルハ, Sakuragi Naruha) is an operative of Scavenger. She is a Level 3 esper with an ability called Perfect Paper (浸紙念力 (パーフェクトペーパー), Shinshi Nenriki (Pāfekuto Pēpā), lit. "Immersed Paper Psychokinesis") that allowed her to manipulate papers into various forms and shapes. Naruha is known for being childish among the team and unconcerned about exposing her body, except for her private parts that were covered with small pieces of paper, during the fight.

Voiced by: Yuka Nukui (Japanese); Rachel Glass (English)

Tarōmaru Seike (清ヶ太郞丸, Seike Tarōmaru) is an operative of Scavenger known for being the only male on the team. He is an esper with an ability called Stick Slip (摩擦増減 (スティックスリップ), Masatsu Zōgen (Sutikku Surippu), lit. "Friction Fluctuation") that could control frictional coefficients within a meter of himself. Tarōmaru is always seen wearing seifuku and has a tattoo of a skull with horns and chains.

Freshmen (新入生, Shinnyusei) is one of the dark side organizations in Academy City tasked to eliminate intruders with supernatural powers that were not developed in the city. The team is first introduced in the New Testament: A Certain Magical Index light novel series.

Umidori Kuroyoru (黒夜 海鳥, Kuroyoru Umidori) is an operative of Freshmen and a test subject of the Dark May Project. She is a cyborg and Level 4 esper with an ability called Bomber Lance (窒素爆槍 (ボンバーランス), Chisso Bakusō (Bombā Ransu), lit. "Nitrogen Bomb Lance") that allowed her to produce nitrogen-made spears from her hands. She is always seen wearing gothic lolita clothes with a white coat hanging on her head.

Voiced by: Yutaka Nakano (Japanese); Cole Brown (Seasons 1-2, Railgun, Railgun S, Movie), Bill Brooks (Season 3, Accelerator) (English)

Heaven Canceller (ヘヴンキャンセラー, Hevun Kyanserā) is a doctor in District 7's hospital and called "the frog-faced doctor" by Tōma and others. His name is written as "Meido Gaeshi" (冥土帰し) that meant "Rescuer from the Other World" because of his ability to fully restore fatally injured patients from their brink of death. Heaven Canceller is an exceptionally gifted and benevolent physician as he can cure any illness and heal any injuries, but he cannot bring back the dead and is unable to fix brain-related injuries, such as Tōma's wiped memories and Accelerator's computation ability. He saves anyone's health, whether they are an ally or enemy, as he faithfully follows the Hippocratic Oath.

Sphynx (スフィンクス, Sufinkusu) is Index's pet calico cat. Index finds it alone in a box. Tōma then tries to prevent her from keeping the cat because his dormitory prohibits pets, but they still pull it off without anyone suspecting them.

Voiced by: Yumi Tōma (Japanese); Caitlin Glass (English)

Kikyō Yoshikawa (芳川 桔梗, Yoshikawa Kikyō) is a researcher for the Level 6 Shift Project and Aiho's close friend. She is the first adult that Accelerator seemed to trust because she casually chats with and cares for him. Kikyō remains inside the facility even after the project was put on hiatus as she investigates Last Order's escape from her life-support machine and the virus that Ao inputted in her. She gets shot by Ao but she is later saved by Heaven Canceller. After she was discharged from the hospital, Kikyō stays in Aiho's apartment and becomes the guardian of Accelerator and Last Order along with her. She reveals her desire to become a teacher since that was her plan even before becoming a researcher.

Voiced by: Tatsuhisa Suzuki (Japanese); Kent Williams (English)

Ao Amai (天井 亜雄, Amai Ao) is a researcher for the Radio Noise Project (or Sisters Project), where he specialized in creating personality data with self-learning capabilities, and becomes involved in the Level 6 Shift Project. He later associates himself with an outside organization called "Science Association" to sell classified Academy City information as a means of repaying his large debts caused by the shutdown of the Level 6 Shift Project he heavily invested in. He is responsible for the virus inputted in Last Order which would forcibly make her command Mikoto's clones to go on a rampage via the Misaka Network. Ao is killed by Kikyō after he shot Accelerator in the head when he interrupted the virus's activation.

Voiced by: Atsuko Tanaka (Japanese); Anastasia Muñoz (English)

Harumi Kiyama (木山 春生, Kiyama Harumi) is a teacher for the Child Errors and an AIM researcher who worked for Gensei. She is well-known for her unashamed stripping in public as a result of being a researcher for years, earning her the alias "Stripping Woman" (脱ぎ女, Nugi Onna) by urban legends web forums. Harumi has introduced in A Certain Scientific Railgun manga and anime series as the creator of Level Upper, an audio file designed for unlocking or enhancing esper powers. Because of this, she gains an ability called Multi-Skill (多才能力 (マルチスキル), Tasai Nōryoku (Maruchi Sukiru), lit. "Versatility Ability") that allowed access of multiple abilities from espers connected to the Level Upper network such as water manipulation, wind manipulation, teleportation, Synchrotron, ice creation, shock wave creation, beam slicing, and concrete cutting. She later loses control of the network during her fight with Mikoto, producing an AIM entity on his head called the "AIM Burst".

In the Level Upper story arc, Harumi reveals her true intention of saving her former Child Error students that were used in an inhumane experiment by Gensei. She is later arrested by Anti-Skill but she vows to continue her research of finding a cure for them. Harumi returns in the Poltergeist story arc when she was bailed out by Heaven Canceller and continued working for a cure along with him. She later manages to save the students with the help of Mikoto and her friends.

Voiced by: Sachika Misawa (Japanese); Megan Shipman (English)

Arisa Meigo (鳴護 アリサ, Meigo Arisa) is the main heroine of A Certain Magical Index: The Movie – The Miracle of Endymion and a talented singer. She is a Level 0 esper yet she can cause miracles to happen through singing. Tōma and Index meet Arisa, and she tells them about her audition to become the mascot of Endymion. She is later targeted by Stiyl, who warned that she could be the cause of a war between magic and science sides. Arisa attracts Shutaura's interest for an unknown reason until the latter reveals that she was her alter ego, who got separated from her during the Orion incident. By the end of the movie, Arisa and Shutaura merge back.

Voiced by: Yōko Hikasa (Japanese); Whitney Rodgers (English)

Shutaura Sequenzia (シャットアウラ＝セクウェンツィア, Shattoaura Sekuuentsuia) is an original character introduced in A Certain Magical Index: The Movie – The Miracle of Endymion and the leader of a private security organization called "Black Crow Unit". She is a Level 4 esper with an ability called Earth Palette (希土拡張 (アースパレット), Kido Kakuchō (Āsu Paretto), lit. "Rare Earth Expansion") that allowed her to store rare-earth elements and release them as explosive energies. Shutaura is one of the 88 survivors of the Spaceplane Orion crash where she lost her ability to discern music, resulting in her hearing them as static instead. She also becomes hateful of people who used the word "miracle" because they only highlight the survivors dubbed as "Miracle 88" without honoring the death of her father, the 89th passenger, caused by Academy City's release of the repudiated incident report to the public. At the end of the movie, Shutaura merges back with Arisa after Tōma used his Imagine Breaker on her.

Voiced by: Ayane Sakura (Japanese); Maxey Whitehead (English)

Ladylee Tangleroad (レディリー＝タングルロード, Redirī Tangururōdo) is a magician and the president of Orbit Portal Company. She spearheads the construction of a space elevator called "Endymion" after the Orion incident. Ladylee Tangleroad is an immortal living for almost a thousand years after she ate a magic fruit called "ambrosia". She plans on ending her life already by destroying the Earth's Northern Hemisphere using Endymion and Arisa's voice, as the space elevator symbolizes the magical Tower of Babylon and her singing power can activate a magical array in space.

Voiced by: Iori Nomizu (Japanese); Kara Edwards (English)

Febrie (フェブリ, Feburi) is an original anime character introduced in A Certain Scientific Railgun S anime series. She has a child-like innocence and shown interest in Gekota when she persuaded Mikoto to hand over her pink Gekota finger puppet. Febrie is friendly with Mikoto's friends, except Mikoto herself, but she later begins to like her in the series. In the Silent Party story arc, she is revealed to be a Chemicaloid, an artificial human created by STUDY using Shinobu's Testament. Her body produces a poison that required her to eat special lollipops, made up of a neutralizing compound, to stay alive. At the end of the story arc, Febrie and her twin named Janie are flown outside Academy City to have their bodies be readjusted.

Voiced by: Shinji Kawada

Mitsuko Kongō's father (婚后光子の父親, Kongō Mitsuko no Chichioya) is the unnamed father of Mitsuko and Tabigake's friend, who currently led the Kongō Airlines. In the Silent Party story arc, he assists Mikoto and her friends in their fight against STUDY by sending a large robot called "Ekaterina II S" that his daughter requested.

Seigo Houjou (北条静護, Houjou Seigo) is introduced in A Certain Scientific Railgun: Astral Buddy manga series as a doctor in Heaven Canceller's hospital and researcher assigned in Clone Dolly Project's third laboratory called "Ideal". He loses his senses of pain and taste along with his emotions after he got possessed by an uncontrollable AIM aggregation during his tenure in the Ideal lab.

Voiced by: M·A·O

Stephanie Gorgeouspalace (ステファニー＝ゴージャスパレス, Sutefanī Gōjasuparesu) is a mercenary and close friend of Chimitsu. She is seen wearing an urban camouflage jacket over her green shirt and googles, appearing overall as more of an actress than a hitman. Stephanie's style of eliminating targets is through the use of powerful explosives instead of long-distance sniping that Chimitsu would usually do.

In the DRAGON story arc, she kills Thomas instead of her assigned target (Accelerator) after she heard his plan of using Chimitsu as a bargaining chip against her. Stephanie then fights Saiai in an underground mall as she robs her control of nitrogen around the area but Saiai manages to defeat her with the help of a reserved liquid nitrogen canister. She returns in the seventh volume of New Testament: A Certain Magical Index light novel series when she was taken out of prison and coerced to work with Anti-Skill. Stephanie and Aiho are partnered to deal with fluid mechanics expert named Dr. Matsusada as he tries to leave Academy City illegally via airplane at District 23.

Voiced by: Mitsuru Miyamoto (Japanese); Andy Mullins (English)

Aiwass (エイワス, Eiwasu) is a mysterious being, based on an entity's voice of the same name, summoned by Aleister and the writer of The Book of the Law. He judges things based on their value, unlike Aleister who judged them according to their efficiency. In the DRAGON story arc, Aiwass manifests before Accelerator and the two clash. He later mentions to him a method of saving Last Order by finding Index in Russia. In the World War III story arc, Aiwass expands the AIM diffusion field into Russia with the assistance of the Misaka Network and instructs Hyōka to restrain Archangel Gabriel.

Voiced by: Yurika Kubo[16] (Japanese); Amber Lee Connors (English)

Esther Rosenthal (エステル＝ローゼンタール, Esuteru Rōzentāru) is one of the heroines introduced in A Certain Scientific Accelerator manga and anime series as a magician who specialized in necromancy. In the Necromancer story arc, Esther evades the pursuing Disciplinary Action and enters a hospital room, where Accelerator rest. She asks him for information about Last Order but she is caught by a Disciplinary Action operative named Nishio. Esther manages to escape them and later teams up with Accelerator to foil the plan of rouge Anti-Skill members to add a new layer to the world using Last Order.

Voiced by: Ryōta Ōsaka (Japanese); Adam Gibbs (English)

Mikihiko Hishigata (菱形幹比古, Hishigata Mikihiko) is a neuroscientist introduced in A Certain Scientific Accelerator manga and anime series, who created a machine that housed a deceased esper called "Coffins". He affiliates himself with Disciplinary Action for his agenda. Mikihiko is often seen with a lollipop in his mouth and has verbal tic, sometimes ending his sentences with 'un' (うん, yeah).

Voiced by: Kazuyoshi Hayashi (Japanese); Mark Stoddard (English)

Keitz Nokleben (カイツ＝ノックレーベン, Kaitsu Nokkurēben) is a researcher assigned as the security supervisor for the Level 6 Shift Project. His name is originally unknown in A Certain Scientific Railgun manga series until the release of its anime adaptation. He learns about Mikoto's attacks at research facilities involved in the project during the Sisters story arc. Since the shutdown of the project, Keitz becomes Misaki's informant and secures Misaka #10032 inside the Exterior building for protection against organizations interested in the Sisters clones.

Fräulein Kreutune (フロイライン＝クロイトゥーネ, Furoirain Kuroitūne) is a mysterious woman who had existed for a long time and was imprisoned in the Windowless Building until she is rescued by Tōma and Thor. She becomes the friend of Last Order and Fremea Seivelun.

Rensa #28 (恋査 #28, Rensa #28) is the 28th designated operator of the Rensa cyborg and Hisako's assistant in her hospital. She is seen wearing a purple cardigan over her pink nurse attire. Rensa #28 has an odd habit of nicknaming patients and hospital rooms.

Etsu Aihana (藍花 悦, Aihana Etsu) is the mysterious Academy City's #6 Level 5 esper. His ability allows an individual to receive power from his name and make it their "ideal self". His personal information and identity are currently unknown. In New Testament: A Certain Magical Index light novel series, Etsu officially debuts during the Magic God Othinus story arc when he silently toyed his phone after he received an email with instructions to kill Tōma and Othinus. At the end of the St. Germain story arc, he speaks over the phone to Skill-Out member Yokosuka about his plan of helping other people by lending his name. In Genesis Testament: A Certain Magical Index light novel series, Etsu appears in front of Tōma inside a hospital and offers his name to gain power for his fight against Anna.

The British royal family is a family of close relatives of the monarch of the United Kingdom. Queen Elizard, based on the real-life British queen, is the current head of the monarch and Supreme Head of the Church of England. The members of the royal family are magic users for generations as they represent the magic nobility. The family resides in Buckingham Palace but they usually use Windsor Castle as their second home.

Elizard (エリザード, Erizādo)

Voiced by: Yōko Sōmi (Japanese); Casey Casper (English)

Elizard is the current queen regnant of the United Kingdom. She is the wielder of a ceremonial sword called "Curtana Second" that allowed her to receive empowerment from Archangel Michael's angelic power.

Riméa (リメエア, Rimēa)

Voiced by: Mari Hino (Japanese); Katelyn Barr (English)

Riméa is the eldest daughter of Elizard and the first princess of the British royal family. She has shoulder-length black hair and wears a monocle on her left eye. While she is notably very intelligent, Riméa is extremely cautious and does not trust anyone who identified her as a princess. Before the events of the English revolution called the "British Halloween", Riméa does not join Carissa in investigating the bombing of Eurotunnel and likely hides in London or a nearby city. She later observes afar the battle that took place in Buckingham Palace and learns about Carissa's true plans. She then uses a communication spell to plead to the people present in the palace to save Carissa. Riméa returns in the New Testament: A Certain Magical Index light novel series during Crowley's Hazards' invasion of London. Riméa and the rest of the British royal family (except Carissa) get evacuated from London to refuge in Scotland via royal carriages. She brandishes the Curtana Lost towards Samuel Liddell as he attacks the convoy. In the Kamijō story arc, Riméa assists Tōma in infiltrating Windsor Castle as he confronts his doppelganger there.

Carissa (キャーリサ, Kyārisa)

Voiced by: Kei Shindō (Japanese); Dawn M. Bennett (English)

Carissa is the second daughter of Elizard and the second princess of the British royal family. She is always seen wearing a red dress with added arm-length red gloves and a golden crown. Carissa possesses an impressive understanding of military strategy and tactics. In the British Royal Family story arc, she stages a coup d'état along with the Knights of England against the monarchy to shift the power balance away from the growing influence of the Roman Catholic Church throughout Europe. She is later defeated by Tōma and her Curtana Original gets destroyed. In the World War III story arc, Carissa leads the British military forces in Dover Strait against the Maiden of Versailles and her French forces. She later works with her to fight the sudden appearance of Archangel Gabriel but the two struggle to defeat the angel until Carissa forces it to retreat by ordering multiple surface-to-air missiles towards the Star of Bethlehem. In the New Testament: A Certain Magical Index light novel series, Carissa voluntarily imprisons herself in the Tower of London for her role in the British Halloween but she is temporarily freed to aid the United Kingdom and its allies in defeating GREMLIN. She later arrives in Denmark to capture Tōma and attack Othinus when he suddenly allied himself with the Magic God. During Crowley's Hazards' invasion of London, Carissa remains imprisoned in the Tower of London and gives Orsola advice about how she will determine if a prisoner disguises themselves as one of the prison guards.

Villian (ヴィリアン, Virian)

Voiced by: Sayaka Harada (Japanese); Emily Fajardo (English)

Villian is the youngest daughter of Elizard and the third princess of the British royal family. She is a timid but benevolent young woman, causing her to become the public face of the royal family and be used in political marriages. In the British Royal Family story arc, Villian becomes upset about Carrisa's plan of using military forces to solve the country's crisis. She gets captured by her and is about to get beheaded when Acqua showed up and saved her. She later joins Tōma and Index in their mission to overload the Curtana Original so that they could begin their counter-attack against Carissa. In the New Testament: A Certain Magical Index light novel series, Villian is present during the chaos in Windsor Castle and meets Accelerator, who recently defeated Elizard, to secure her mother.

Silvia (シルビア, Shirubia)

Voiced by: Yū Kobayashi (Japanese); Anastasia Muñoz (English)

Silvia is the head maid for the British royal family and a Saint. She is acquainted with both the Knight Leader and Kaori. Silvia leaves the United Kingdom to hone her skills as a maid and meets Ollerus on her travels. While she often becomes angry at him for his overly casual attitude and punishes him, Silvia stays with Ollerus because she believes he needs to be cared for. After she completed her training as a maid in Milan, she chooses to stay with him despite the royal family's repeated orders for her to return.

Silvia makes a cameo in the final episode of A Certain Magical Index III anime series when she and Ollerus picked up a badly injured Fiamma. She returns in the fourth volume of New Testament: A Certain Magical Index light novel during the time the artificial Valkyries attack Brunhild inside a hospital. In the Ichihanaran Festival story arc, Silvia accompanies Ollerus in Academy City to stop GREMLIN's plan of retrieving Fräulein. She later fights Thor but she stops her attacks when Leivinia got defeated by Tōma. As they leave Academy City, Silvia teases Leivinia's actions with Tōma like a little sister being scolded by her older brother. In the Magic God Othinus story arc, Silvia is on board the fleet of ships heading towards Tokyo Bay and encounters Hel. In Denmark later, she hunts down Othinus to take revenge for what she had done to Ollerus and gruesomely beats Tōma to make the Magic God feel how to lose someone she cared for.

The Church of England (or Anglican Church) is one of the three largest Christian denominations in the magic world headed by the Archbishop of Canterbury. Its headquarters establishes in St. George's Cathedral in Lambeth, London. The current leader of the Church of England is Dion Fortune.

Necessarius (必要悪の教会 (ネセサリウス), Hitsuyōaku no Kyōkai (Nesesariusu), lit. "Church of Necessary Evil") is the 0th Parish of the Church of England specialized in neutralizing and destroying magic in England, and tasked to investigate, arrest, and punish magicians. The Head of the Church of Necessary Evil is also the current Archbishop of Canterbury.

Lola Stuart (ローラ＝スチュアート, Rōra Suchuāto)

Voiced by: Ayako Kawasumi (Japanese); Carli Mosier (English)

Lola serves as an Archbishop of Canterbury and a leader of Necessarius. She appears as an eighteen-year-old girl but her age and appearance are the same as twenty years ago when Matthai first met her. She is known for her long, blonde hair that weighed 2.5 times her weight and reached her ankles, and is seen wearing a beige robe. Lola speaks funny Japanese because of how Motoharu taught her. Despite being an archbishop, her personality gets described by Stiyl as cold and calculating due to the number of good and evil deeds she had done being equal. In the New Testament: A Certain Magical Index light novel series, Lola reveals herself as possessed by a great demon named Coronzon.

Stiyl Magnus (ステイル＝マグヌス, Suteiru Magunusu)

Voiced by: Kishō Taniyama (Japanese); Robert McCollum (English)

Stiyl is a tall, fourteen-year-old, red-haired magician and priest of Necessarius. His sorcery name is Fortis931, "I prove why my name is the strongest here" (我が名が最強である理由をここに証明する, Waga Na ga Saikyō de aru Riyū o Koko ni Shōmei suru), and magic skills base on runes and fire magic, which included summoning a fiery creature called "Innocentius" (魔女狩りの王 (イノケンティウス), Majogari no Ō (Inokentiusu), lit. "King of Witch Hunters"). Stiyl is known for wearing a black priest robe and has a barcode tattoo under his right eye. He has short temper but he shows kindness as he cares for Index's welfare and promises to protect her at all cost.

Stiyl debuts in the first volume of A Certain Magical Index light novel series when he attempted to retrieve and reset Index's memories but his mission gets foiled by Tōma. He later learns how Necessarius lied to him about Index's condition and helps Tōma to subdue Index while in her John's Pen mode. In the Deep Blood story arc, Stiyl becomes the representative of the Church of England in Academy City to deal with Aurelous and his abduction of Aisa. In the Orsola Aquinas story arc, he receives information from Lola about the stolen Book of the Law. Stiyl, Tōma, and Index join Agnese Forces to rescue Orsola from Amakusas but he later fights the Roman Catholic battle nuns when their plan got revealed. In the Daihasei Festival story arc, Stiyl works with Tōma and Motoharu to stop Oriana and Lidvia from using Croce di Pietro to subjugate Academy City under Roman Catholic Church. In the Document of Constantine story arc, he interrogates prisoners Lidvia and Biagio in the Tower of London for information about God's Right Seat. In the British Royal Family story arc, Stiyl receives an order from Lola to handle the Sky Bus 365 terrorist incident. He then boards a Royal Air Force transport plane and reaches the hijacked plane to help Tōma subdue the terrorist. At the end of the British Halloween, Stiyl becomes enraged with Lola as she uses a spare controller for Index after Fiamma activated her John's Pen mode using an external controller. In the World War III story arc, he attempts to restrain Index that gone berserk.

Sherry Cromwell (シェリー＝クロムウェル, Sherī Kuromuweru)

Voiced by: Akeno Watanabe (Japanese); Stephanie Young (English)

Sherry is a member of Necessarius and the head of the Royal Academy of Arts. Her sorcery name is Intimus115, "I offer everything to my lost friend" (我が身の全ては亡き友のために, Waga mi no subete wa naki tomo no tame ni) and magic skills base on Kabbalah idols, which used chalk or oil pastel to summon a golem named Golem Ellis (ゴーレム＝エリス, Gōremu Erisu). She is known for her dark skin and blonde hair and is seen wearing a black gothic lolita dress.

Sherry is introduced as the antagonist in the sixth volume of A Certain Magical Index light novel series when she infiltrated Academy City intending to attack a person of importance to either Academy City or Necessarius as a means of sparking a war between the science and magic side. During her fight with Tōma, Sherry reveals the reason behind her attack is because of a past experiment conducted by the Church of England and Academy City to create a magician-esper hybrid, which resulted in the death of her friend esper named Ellis. She is later defeated by Tōma. In the Daihasei Festival story arc, Sherry is placed under house arrest by the archbishop and becomes an unlikely friend of Orsola as they search for information about Croce di Pietro in the British Library. In the Acqua of the Back story arc, she gives a lecture about heraldry in the Royal Academy of Arts when she received a call from Orsola regarding Acqua's history. Her knowledge about armorial bearings helps to unveil Acqua's identity as William Orwell. In the British Royal Family story arc, an out-of-control Sherry begins to attack the Knights of England by summoning Golem Ellis but she later calms down after Oriana helped her regain her senses. She then assists Tōma and Kaori in their fight against Carissa at Buckingham Palace. Sherry returns in the New Testament: A Certain Magical Index light novel series when she contacted Kaori regarding the plan to intercept Radiosonde Castle. In the Magic God Othinus story arc, she works with Orsola in the British Library to provide information and analysis for the Anti-GREMLIN Alliance and the invading force sent to attack GREMLIN's base in Sargasso located near Iceland.

Orsola Aquinas (オルソラ＝アクィナス, Orusora Akwinasu)

Voiced by: Aya Endō (Japanese); Mallorie Rodak (English)

Orsola is a former Roman Catholic nun who resided in Chioggia, Italy. She specializes in preaching the gospel to pagan countries and in decoding written codes. Her contribution to the preaching of Christianity earns her a church named after her in Japan. Orsola becomes a target of the Roman Catholic Church after they found her alleged skill in decoding The Book of the Law dangerous. In the Orsola Aquinas story arc, she gets rescued by Tōma and his friends for being persecuted by Agnese Forces. In the Daihasei Festival story arc, Orsola works with Sherry to gather details about Croce di Pietro and contacts Tōma and Motoharu to share her information about the artifact. In The Queen of the Adriatic Sea story arc, she invites Tōma and Index in her house at Chioggia as she prepares to move to London. Orsola and Tōma accidentally board a Queen's Fleet ship where she found Agnese. She then helps in the rescue of her from the hands of Biagio. In the Acqua of the Back story arc, Orsola is in the British Library to find information about Acqua and decides to call Sherry for help. She later calls Saiji to rely on the information she gathered about Acqua. During the British Halloween, Orsola meets Tōma with an injured Lessar and as she treats her wounds, she tells him to head towards Waterloo station for him to use the Eurostar line that would bring him to Folkestone where Index was. In the New Testament: A Certain Magical Index light novel series, Orsola feels helpless during Crowley's Hazards' invasion of London and offers herself to wield a Divine Mixture spiritual item called "Isis-Demeter". She begins to attack Tōma but she gets saved by him after his words about the benefits of a non-violent approach were properly conveyed to her. Orsola is last seen in the Kamijō story arc when she joined the party at Windsor Castle for their victory over Coronzon and appeared drunk.

Oriana Thomson (オリアナ＝トムソン, Oriana Tomuson)

Voiced by: Ryoka Yuzuki (Japanese); Jennifer Green (English)

Oriana is a blonde English magician who served as a devout Roman Catholic nun before becoming a mercenary. Her sorcery name is Basis104, "The one who carries the basis." (礎を担いし者, Ishizue o Ninaishi Mono). She uses her version of a grimoire called Shorthand (速記原典 (ショートハンド), Sokki Genten (Shōtohando), lit. "Shorthand Original") that mixed in symbols and four elements from Western magic. Her physical appearance is that of beauty with a rather attractive figure, which made most women around her jealous. In the Daihasei Festival story arc, Oriana is hired by Lidvia for a special mission to take over Academy City. She is later captured by Necessarius but she makes a deal with them to investigate the source of the Eurotunnel explosion.

Marie Spearhead (メアリエ＝スピアヘッド, Mearie Supiaheddo)

Voiced by: Asami Seto (Japanese); Maeghan Albach (English)

Marie is an original character introduced in A Certain Magical Index: The Movie – The Miracle of Endymion as a witch of the Church of England who specialized in water-based magic.

Mallybath Blackball (マリーベート＝ブラックボール, Marībēto Burakkubōru)

Voiced by: Megumi Han (Japanese); Haley Esposito (English)

Mallybath is an original character introduced in A Certain Magical Index: The Movie – The Miracle of Endymion as a witch of the Church of England who specialized in earth-based magic.

Jane Elves (ジェーン＝エルブス, Jēn Erubusu)

Voiced by: Risa Taneda (Japanese); Sarah Wiedenheft (English)[17]

Jane is an original character introduced in A Certain Magical Index: The Movie – The Miracle of Endymion as a witch of the Church of England who specialized in wind-based magic.

Smartvery (スマートヴェリー, Sumātoverī)

Voiced by: Nana Hamasaki (Japanese); Katlin Moon-Jones (English)

Smartvery is a witch of the Church of England stationed in a mobile fortress called "Coven Compass". She leads the attack of witches against the Knights of England near the island of Islay in the Atlantic Ocean during the British Halloween.

Theodosia Electra (テオドシア＝エレクトラ, Teodoshia Erekutora)

Theodosia is a member of Necessarius who specialized in Norse-based magic. She receives an order from Necessarius to eliminate Patricia but she discovers that the target was innocent as she does not know magic. Theodosia then protects her against Richard who manipulated the mission Necessarius tasked to her.

Jeans Shop Owner (ジーンズ店主, Jīnzu Tenshu)

He is the unnamed owner of a small jeans store in London and an unofficial member of Necessarius. He usually partners with Kanzaki Kaori in various missions.

Richard Brave (リチャード＝ブレイブ, Richādo Bureibu)

Richard is a magician and former member of Necessarius. During his tenure in the organization, Richard contributes to setting up a defensive line along the Atlantic Ocean to prevent American magic cabals from infiltrating the United Kingdom. He creates his signature spell called "Lævateinn" (破滅の枝 (レーヴァテイン), Hametsu no Eda (Rēvatein), lit. "Twig of Destruction") that used a Western sword with runic engravings on it to unleash flames capable of burning anything. His spell classifies as illegal by Necessarius as it includes some scientific elements instead of pure magic, causing his hatred of them. He plots on capturing Patricia because of the Rune Epitaph that Leivinia gave to her but he gets defeated by Stiyl and Theodosia along with Leivinia's Dawn-colored Sunlight operatives.

The Knights of England is the order of magic knights in England headed by the Knight Leader. The Knights have served the United Kingdom since the Crusades and have become the basis of all magic knights over Europe, including Vatican City's Thirteen Knights of the Roman Catholic Church and France's Knights of Orléans. As one of the three magic organizations of the United Kingdom, the Knights represent the magic community within the country's military.

Knight Leader (騎士団長, Kishidanchō, lit "Knight Grandmaster")

Voiced by: Takehito Koyasu (Japanese); David Matranga (English)

The Knight Leader is the title held by the current unnamed leader of the Knights of England. He is a skilled swordsman equipped with a dark-red sword called "Hrunting" and his defensive spell is known as Spell of Thororm (ソーロルムの術式, Sōrorumu no Jutsushiki, lit. Thororm's Technique Formula) that allowed him to turn any magical or scientific weapons' offensive value into zero. He has shown interest in Kaori as he courts her and brings a bouquet for her so that he could invite her to a ball. In the British Royal Family story arc, the Knight Leader and the rest of the Knights of England side with Carissa as she stages a coup d'état against the monarchy. He later defeats Kaori in Folkestone due to the power boost given to him by Carissa's Curtana Original. As he prepares to behead a captured villain, the Knight Leader gets confronted by Acqua, who suddenly arrived and interrupted the execution, and gets defeated by his mercenary tactics. He later joins the resistance force in the battle at Buckingham Palace to stop Carissa. In the New Testament: A Certain Magical Index light novel series, the Knight Leader is not incarcerated for his role in the British Halloween and does not show a willingness to voluntarily imprison himself due to unknown circumstances that he needed to solve first. He becomes part of the invasion force sent to attack GREMLIN's base in Sargasso. After he survived the bombard of Sargasso, the Knight Leader joins Kaori, Carissa, and Acqua in Denmark to capture Tōma and attack Othinus. In the Coronzon story arc, he works with Kaori to fight Aleister (in his girl form) after he entered London when the last barrier of England-Londinium Fortress fell.

Holegres Mirates (ホレグレス＝ミレーツ, Horeguresu Mirētsu)

Holegres is a member of the Knights of England tasked to defend London during Crowley's Hazards' invasion of the United Kingdom. He appears as a fat middle-aged British noble who took pride in his nobility but he lacks chivalry. In the Coronzon story arc, Holegres is found hiding in St. James Palace by Accelerator and gets interrogated atop Nelson's Column for being absent during the battle and using others as sacrificial pawns. He is later sent flying into the side of Elizabeth Tower. In the Kamijō story arc, Holegres reunites with Accelerator and redeems himself in front of him for being present and handling the chaos in Windsor Castle.

New Light (新たなる光, Arata naru Hikari) is a pseudo-cabal reserve force specialized in Norse-based magic. The members wear jackets with the initials of their organization embroidered on them.

Lessar (レッサー, Ressā)

Voiced by: Yūki Takada (Japanese); Brittany Lauda (English)

Lessar is the most prominent member of New Light in A Certain Magical Index light novel series and its sequel. Her spiritual accessory is a dragon-like tail under her skirt, which allowed her to balance herself mid-air. Lessar shows patriotism to the United Kingdom and she does whatever is necessary to make Tōma work with New Light for the country's sake, like seducing him. In the British Royal Family story arc, Lessar gets chased by Tōma and Oriana, who both cornered her afterward. She later gets wounded by a shot using a magical arrow called "Robin Hood". A wounded Lessar reveals to them that New Light got hired to excavate Curtana Original and deliver it to Carissa. Lessar receives treatment from Orsola when Tōma carried her in the women's dormitory of Necessarius. In the World War III story arc, Lessar accompanies Tōma in Russia and attempts to seduce him throughout their journey. She helps Sasha in disrupting Fiamma's control over the Star of Bethlehem and tells Tōma to leave the place as soon as possible before she escapes. In New Testament: A Certain Magical Index light novel series, Lessar receives intel about Tōma's return to Academy City with the help of Leivinia. She becomes irritated because her seducing efforts get wasted and tells Lancis to take over in charming Tōma. In the Magic God Othinus story arc, Lessar and Leivinia visit Tōma's dormitory to seek his Imagine Breaker in destroying Gungnir. Near the end of the story arc, Lessar witnesses afar Tōma and Othinus' conclusion of their journey in Denmark, where the Magic God would later become a 15-centimeter fairy. In the Coronzon story arc, Lessar and Leivinia receive instruction to transport a Divine Mixture spiritual item called "Wadjet-Leto" to the British Museum. She is last seen in Genesis Testament: A Certain Magical Index light novel series when she investigated the sudden rise of R&C Occultics along with Leivinia.

Bayloupe (ベイロープ, Beirōpu)

Voiced by: Natsumi Fujiwara (Japanese); Michelle Rojas (English)

Bayloupe is the leader of New Light and the eldest among the group. Her spiritual accessory is hearing-aid-like devices behind her ears with two vacuum-tube-like objects sticking from each one called "Gjallarhorn", which allowed her to incorporate its wisdom in her Steel Glove so that she could partially use the thunder attribute of Thor. In the British Royal Family story arc, Bayloupe subdues Itsuwa in an underground railway station platform but she later gets defeated by her when she succumbed to the traps in the tunnel that turned out as an off-limit Necessarius facility.

Floris (フロリス, Furorisu)

Voiced by: Minori Suzuki (Japanese); Morgan Berry (English)

Floris is a member of New Light. Her spiritual accessory is small dragon-like wings at her back, which helped her to offset her falling speed. In the British Royal Family story arc, a captured Floris gets saved by Tōma inside a train as he sneaks in it to reach Folkestone but they alert the onboard Knights of England. Floris saves him with her wings after the two jumped out of the train to escape the guards and they end up floating on a nearby river, where they got found by an Amakusa Catholic scout. She becomes enraged at Tōma because she thinks that he brought her back to the Amakusas who defeated her earlier. This event has caused Floris to have a grudge against Tōma since then.

Lancis (ランシス, Ranshisu)

Voiced by: Rui Tanabe (Japanese); Kristen McGuire (English)

Lancis is a member of New Light. Her spiritual accessory is dragon-like claws wore on her fingers. She has a strange magic condition that gave her a tickling sensation when she used magic power. In the British Royal Family story arc, Lancis holds the suitcase that contained Curtana Original and positions herself 30 km north of London. As her comrades get captured, she successfully delivers the artifact to Knight Leader.

Dawn-colored Sunlight (明け色の陽射し, Akeiro no Hizashi) is the largest Golden-style magic cabal in Europe led by Leivinia. Their goal is to unite the magic and science sides and rule over them.

Leivinia Birdway (レイヴィニア バードウェイ, Reivinia Bādowei)

Voiced by: Yō Taichi (Japanese); Ariel Graham (English)

Leivinia is a twelve-year-old, blonde-haired leader of Dawn-colored Sunlight and Patricia's older sister. Her sorcery name is Regnum771 that meant "kingdom" in Latin. She uses a magical wooden wand called "Wand of Swords and Cups" (剣と杯の杖, Ken to Hai no Tsue) that allowed her to cast magic based on the four elements and a full set card of Major Arcana that helped to boost her parameters and make a supersonic movement. Her actions and personality are described as merciless, unreasonable, and overwhelming. In the British Royal Family story arc, Leivinia advises Mark to not get involved during British Halloween despite their chance to analyze Curtana. In the World War III story arc, she saves Tōma from the Arctic Ocean after he defeated Fiamma.

Leivinia majorly debuts in the New Testament: A Certain Magical Index light novel series when she brought Tōma back to Academy City and introduced Accelerator and Shiage to the world of magic. In the Hawaii Invasion story arc, she recruits the three along with Mikoto, Misaka Worst, and Umidori to draw out core members of GREMLIN by infiltrating Hawaii and making the 27 Cooperative Institutions of Academy City break off with Academy City due to her teammate's connection with the city once they save the island state. In the Ichihanaran Festival story arc, Leivinia works with Ollerus and arrives in Academy City to foil GREMLIN's plan of capturing Fräulein. She faces Tōma, who felt a grudge on her due to her betrayal of them back in Hawaii, but she becomes horrified when he got shot by Anti-Skill. Leivinia later fights Tōma and gets defeated by him. As she leaves Academy City, Leivinia gets teased by Silvia for her feeling of being like a little sister getting scolded by her big brother. In the Magic God Othinus story arc, she arrives in Tōma's dormitory along with Lessar to recruit him in destroying Gungnir. Leivinia later fights Tōma on Little Belt Bridge in Denmark when he suddenly sided with Othinus but she comes to an understanding with him of his reason behind saving the Magic God. In the World Rejecter story arc, she studies African cannibalization to use it for her sister that got infected by Sample Shoggoth. In the Coronzon story arc, Leivinia works with Lessar to deliver a Divine Mixture spiritual item called "Wadjet-Leto" to the British Museum. She is last seen in the Genesis Testament: A Certain Magical Index light novel series when she investigated the sudden rise of R&C Occultics along with Lessar.

Mark Space (マーク＝スペース, Māku Supēsu)

Mark is Leivinia's loyal personal assistant and member of Dawn-colored Sunlight. His sorcery name is Armare091 and he specializes in using Minor Arcana tarot cards to perform elemental spells.

Patricia Birdway (パトリシア バードウェイ, Patorishia Bādowei)

Voiced by: Satomi Amano[18]

Patricia Birdway is Leivinia Birdway's younger sister. She has a Ph.D. at the young age of 12, becoming a renowned researcher who got worked on university-run projects and sponsored by Academy City or its cooperative institutions to join laboratories and research ships as a guest researcher. Her twenty or more published research papers attract the attention of schools that wanted to bring her in. In the World Rejecter story arc, Patricia accompanies an Academy City-sponsored research team to Antarctica where she got infected by the Sample Shoggoth parasite. She eventually arrives in Academy City as she seeks medical institutions that would cure her. Patricia is saved by Magic God Nephthys who converted her own body into fats that would replace the ones consumed by the parasite. Despite the recent events that transpired in the story arc, she still shows oblivion about the existence of magic.

The Roman Catholic Church is one of the three religious organizations that ruled the magic side with two billion followers under the leadership of the Pope. The current leader of the church is Pietro Yogdis who served as a cardinal before his promotion.

Matthai Reese (マタイ＝リース, Matai Rīsu)

Voiced by: Masafumi Kimura (Japanese); Bob Magruder (Seasons 1-2), Jim White (Season 3) (English)

Matthai serves as a Pope of the Roman Catholic Church. When the magic world discovered the existence of Tōma and his right hand's power, he is convinced by Fiamma to declare him an enemy of the world and a heretic that must be eliminated. When he later learned about Fiamma's deception, Matthai is suddenly attacked by his powerful spell that could destroy Vatican City but he diverts the spell on himself to save the city. He is later hospitalized and manages to recover from his wounds. Matthai then quells the riot in Rome and takes back the church's leadership from the bishops who supported Fiamma. He is contacted by Vasilisa to work together in bringing down the Star of Bethlehem. He steps down from his position after World War III.

Aureolus Izzard (アウレオルス＝イザード, Aureorusu Izādo)

Voiced by: Tomokazu Sugita (Japanese); Jason Liebrecht (English)

Aureolus is an eighteen-year-old alchemist and a magician from the Roman Catholic Church who betrayed the organization. His sorcery name is Honos628, "My honor is for the world" (我が名誉は世界のために, Waga Meiyo wa Sekai no Tame ni). Aurelous possesses a powerful form of alchemy called Ars Magna (黄金練成 (アルス＝マグナ), Ōgon Rensei (Arusu Maguna), lit. "Golden Training") that allowed him to turn his thoughts into reality by uttering them in words. His ability is heavily reliant on his belief and state of mind; the more he doubts, the weaker his spell becomes until it does not activate at all. In the Deep Blood story arc, Aurelous reveals that he was Index's former partner three years ago and became devastated after he learned about the young nun's forceful erasure of her memory to save her life. He eventually works with Aisa to spare Index from yearly erasing her memories, and uses her powers to attract and catch a vampire so that he could use them as a method of transforming Index into a vampire, which would help her overcome her life expectancy. When he learned about Tōma's rescue of Index's life, Aurelous angrily makes everyone his enemy but he is stopped by Tōma using his Imagine Breaker against his power, which led to his madness. Out of pity, Aureolus' appearance is transformed by Stiyl so that the Roman Catholic Church could not capture and punish him.

Lidvia Lorenzetti (リドヴィア＝ロレンツェッティ, Ridovia Rorentsetti)

Voiced by: Rei Sakuma (Japanese); Rachel Robinson (English)

Lidvia is a Catholic nun and radical among the Roman Catholic Church known as "Mardi Grass". She can convert people to Christianity regardless of their societal status: criminals, non-believers, or other magicians that shared no connection with the Roman Catholic Church. In the Daihaisei Festival story arc, Lidvia attempts to convert Academy City's populace into Roman Catholics using an artifact called Croce di Pietro but her plan gets thwarted by Tōma, Motoharu, and Stiyl, and she later gets captured by Necessarius. In the Document of Constantine story arc, she is being imprisoned in the Tower of London and gets interrogated by Stiyl for information about God's Right Seat.

Biagio Busoni (ビアージオ＝ブゾーニ, Biājio Busōni)

Voiced by: Norio Wakamoto (Japanese); Barry Yandell (English)

Biagio is a middle-aged bishop of the Roman Catholic Church and a magician who specialized in cross-related powers. In The Queen of the Adriatic Sea story arc, he commands the mobilization of the Roman Catholic Church's magical weapon called "The Queen of the Adriatic Sea" to annihilate Academy City after Lidvia failed her mission. His plan gets disrupted when Amakusa Catholics attacked the fleet and he is later defeated by Tōma. In the Document of Constantine story arc, Biagio is being imprisoned in the Tower of London and listens as Lidvia provides information to Stiyl about God's Right Seat.

Agnese Forces is a religious paramilitary unit of the Roman Catholic Church with over 250 battle nuns that specialized in magic combat.

Agnese Sanctis (アニェーゼ＝サンクティス, Anyēze Sankutisu)

Voiced by: Rie Kugimiya (Japanese); Alex Moore (English)

Agnese is the leader of the Agnese Forces. She wields a staff called "Lotus Wand" that could inflict any damage to her opponent by damaging the staff as well. She has long red braided hair and wears chopine to compensate for her small stature. In the Orsola Aquinas Rescue story arc, Agnese and her forces help Necessarius in their search for Orsola and The Book of the Law grimoire. After Agnese Forces successfully rescued the missing Roman Catholic nun, Agnese tortures Orsola while inside the Church of Orsola but gets defeated by Tōma. In The Queen of the Adriatic Sea story arc, Agnese boards The Queen of the Adriatic Sea's fleet to serve as a sacrificial pawn for the activation of the Rosary of the Appointed Time spell that would make the flagship destroy Academy City. She is later rescued by Orsola. Agnese then joins Necessarius but she tries to reconnect with the Roman Catholic Church.

Lucia (ルチア, Ruchia)

Voiced by: Mariya Ise (Japanese); Lauren Landa (English)

Lucia is a member of the Agnese Forces. She is a tall woman with long blonde hair and blue eyes. She has a serious nature and dislikes non-Catholics very much. Lucia uses a large carriage wheel called "Catherine Wheel", based on the legend of Saint Catherine of Alexandria, which could explode into pieces of shrapnel that injured her opponents and revert to its original form.

Angelene (アンジェレネ, Anjerene)

Voiced by: Azusa Kataoka (Japanese); Kristin Sutton (English)

Angelene is a member of the Agnese Forces and Lucia's partner. She is slightly shorter than her partner with long honey-colored braided hair. She seems to be quite shy in contrast to her partner, though her personality at times can be childish, and she does get angry. She has a real sweet tooth for various desserts and sweet drinks. Her magic uses four bags of coins hanging around her waist, referencing Apostle Matthew's position as a tax collector, which could transform into four elements (air, earth, fire, and water) and launch them as projectiles to her opponents. In her childhood, Angelene is abandoned by her parents while in France but she is later taken into custody by the Roman Catholic Church, where she became a nun-in-training.

Agata (アガター, Agatā)

Voiced by: Mai Fuchigami (Japanese); Leah Clark (English)

Agata is a member of the Agnese Forces. She has blue eyes and long brown hair and is seen wearing eyeglasses. In The Queen of the Adriatic Sea story arc, Agata helms the 47th ice ship of the Queen's Fleet and reports to Biagio about the surprise attack conducted by Amakusa Catholics in their fleet. In the British Royal Family story arc, she helps the Agnese Forces in their investigation of New Light's hideout. Agata returns in the New Testament: A Certain Magical Index light novel series when she and some members of the Agnese Forces got picked up by Shiage with his pickup truck while fleeing from Crowley's Hazards.

God's Right Seat is a four-member secret magical organization within the Roman Catholic Church with members representing four Archangels of Catholicism. Their goal is to achieve La Persona Superiore a Dio ('The One Above God') by erasing the original sin.

Vento of the Front (前方のヴェント, Zenpō no Vento)

Voiced by: Akiko Hiramatsu (Japanese); Kara Edwards (English)

Vento is a member of God's Right Seat blessed with the nature of "God's Flame" and aligned with Archangel Uriel. She uses a suppression spell called Divine Punishment (天罰術式, Tembatsu Jutsushiki, lit. Damnation Arts) that could render people with evil intentions against her unconscious and wields a barbed hammer that represented the hammer used to nail the Son of God. Her face is heavily pierced with heavy makeup over it. In her childhood, Vento visits an amusement park with her brother, who died in an accident inside the park; thus, she grows up with a deep hatred for science and technology. In the Academy City Invasion story arc, she invades Academy City and causes havoc to kill Tōma, but she fails due to the intervention of Hyōka (in Fuse Kazakiri mode) and later gets defeated by Tōma. Vento later returns during World War III to hunt down Fiamma for betraying Vatican City.

Terra of the Left (左方のテッラ, Sahō no Terra)

Voiced by: Hōchū Ōtsuka (Japanese); George Manley (Season 2), Garrett Schenck (Season 3) (English)

Terra is a member of God's Right Seat blessed with the nature of "God's Medicine" and aligned with Archangel Raphael. He uses a spell called Execution of Light (光の処刑, Hikari no Shokei) that used its by-product (flour) to manipulate the "hierarchy" of everything around him. He appears to be a small, menacing-looking old man and is seen wearing a green ceremonial robe. In the Document of Constantine story arc, Terra meets Tōma and Itsuwa in a museum where the two tried to destroy a spell pipeline. In their fight later in Palace of the Popes, Terra seems to know something about Tōma's Imagine Breaker when he correctly deduced about his memory loss but he misses the chance to explain it to him. He is later killed by Acqua upon his return to Vatican City. In the Acqua of the Back story arc, Terra's corpse is sent to the Church of England as Acqua challenges them.

Acqua of the Back (後方のアックア, Kōhō no Akkua) / William Orwell (ウィリアム＝オルウェル, Uiriamu Oruueru)

Voiced by: Hiroki Tōchi (Japanese); Andrew T. Chandler (Season 2), Chris Ryan (Season 3) (English)

Acqua is a member of God's Right Seat blessed with the nature of "Power of God" and aligned with Archangel Gabriel. Because of his alignment, he is blessed with an ability called Divine Mother's Mercy (聖母の慈悲, Seibo no Jihi) that could nullify the liabilities of certain special spells to allow him to perform powerful spells under unfit conditions. Unlike the other members of God's Right Seat, he is not corrupt and does not ignore the opinions of the Pope. Before joining the Roman Catholic Church, Acqua serves as a mercenary for the Church of England and is friends with the current Knight Leader of the Knights of England. His true name is William Orwell and his sorcery name is Flere210, "The one who changes the reason of tears" (その涙の理由を変える者, Sono Namida no Riyū o Kaeru Mono). Acqua is a Saint that endowed him with superhuman capabilities such as the strength to carry weapons twice as large as him. With the help of his Divine Mother's Mercy ability, he can use 100% of the capabilities offered to him as a Saint, which demonstrated a considerable gap between his abilities and Kaori's. In the Acqua of the Back story arc, he is defeated by Tōma and the Amakusa Catholics then he loses the Divine Mother's Mercy ability. In the British Royal Family story arc, Acqua returns to England during the British Halloween wielding a replica of the dragon slayer sword called "Ascalon" (アスカロン, Asukaron) and saves Princess Villian. He then fights his former friend and comrade Knight Leader. In the World War III story arc, Acqua heads to Russia to stop Fiamma's plans and saves Shiage and Rikō from a group of mercenaries upon encountering them. He ends up helping Accelerator and Hyōka against Archangel Gabriel and weakens the angel by absorbing its powers. Acqua returns in the New Testament: A Certain Magical Index light novel series during the Magic God Othinus story arc when he is temporarily freed from the Tower of London to assist the United Kingdom in their fight against GREMLIN. He later joins Carissa and Knight Leader during their hunt of Tōma and Othinus in Denmark.

Fiamma of the Right (右方のフィアンマ, Uhō no Fianma)

Voiced by: Toshiyuki Morikawa (Japanese); Christopher Wehkamp (English)

Fiamma is the leader of God's Right Seat blessed with the nature of "Likeness of God" and aligned with Archangel Michael. He holds the symbol of miracles called Holy Right (聖なる右, Seinaru Migi) that could manifest a bird-like claw from his shoulder to use as his main form of attack. However, he is unable to use its full potential and believes that Tōma, Index, and Sasha held the answer to his dilemma. He is a tall, slim man wearing a red suit. In the British Royal Family story arc, Fiamma mocks a defeated Carissa as he reveals his influence that caused the Eurotunnel incident. He shows Queen Elizard's spiritual remote control for Index in front of her and Tōma. In the World War III story arc, he heads to Russia to capture Sasha, who served as the key to invoke Archangel Gabriel and to acquire the Star of Bethlehem, so that he could fix the elemental balance affecting the creation of the Holy Right ability and could gain full control of it. Knowing that Tōma is aboard the Star of Bethlehem, Fiamma fights him and tries absorbing the flesh of his right hand but he fearfully notices that his arm gathered not one but two massive and overwhelming powers. He is then challenged by Tōma, who remarked about his existence being the most powerful and his unreasonable stealing of the power of various churches; furthermore, Fiamma's powers always adjust to match his opponent's so he triggers the war to cause enough 'ill will' in the world to set it as 'the enemy that needs to be defeated' as a result of fearing that he does not have the 'power enough to save the world'. With his conviction lost and defeated, Fiamma is saved by Toma, who convinced him to live to change the future. However, Fiamma is seen by Aleister as a threat for knowing too much about the true purpose of Imagine Breaker and is brought to death by him. However, a dying Fiamma is found by Silvia and Ollerus and gets questioned about his Aeon of Osiris power and Aleister's Aeon of Horus power.

The Russian Orthodox Church is one of the three largest religious organizations that ruled the magic side. Its headquarters is located in Moscow. According to Motoharu, the Russian Orthodox Church specializes in ghost-hunting, whereas the Church of England is known for witch-hunting.

Krans R. Tsarskiy (クランス＝R＝ツァールスキー, Kuransu R Tsuārusukī)

Voiced by: Asuna Tomari (Japanese); Derick Snow (English)

Krans is a young boy who currently served as the Patriarch of the Russian Orthodox Church. In the World War III story arc, he is imprisoned in his palace by Nikolai. After he is rescued by Vasilisa, Krans provides information regarding a spell that ran the Star of Bethlehem. He later signs a proclamation ending the war. In New Testament: A Certain Magical Index light novel series, Krans arrives in the United Nations headquarters to represent Russia as France, the United Kingdom, the United States, and Vatican City convene an allied conference to defeat GREMLIN.

Nikolai Tolstoy (ニコライ＝トルストイ, Nikorai Torusutoi)

Voiced by: Ryūnosuke Watanuki (Japanese); Kent Williams (English)

Nikolai serves as a Russian bishop of the Russian Orthodox Church. He is known for his spiritual item based on Russian folklore about a witch who guarded two springs called Water of Death (死の水, Shi no Mizu) that could disintegrate a target using water. He allies with Fiamma in exchange for him to become the next Patriarch. In the World War III story arc, Nikolai falsifies a document that would mobilize the Russian military using Kran's electronic signature from a dummy document. He is later killed by Vasilisa after his spiritual item failed on her.

Annihilatus (殲滅白書, Senmetsu Hakusho, lit. "Policy of Extermination") is the secret magical organization within the Russian Orthodox Church specialized in exterminating ghosts and other nonexistent beings.

Vasilisa (ワシリーサ, Washirīsa)

Voiced by: Yōko Honna (Japanese); Leah Clark (English)

Vasilisa is the leader of Annihilatus and Sasha's superior, based on a heroine of Russian folklore of the same name. She shows her childish behavior, vanity towards skincare, and weird interest in Japanese otaku culture, which earned her a dislike from Sasha. In the British Royal Family story arc, Vasilisa helps Sasha to escape the Russian Orthodox Church and fights Skogsfru. In the World War III story arc, she arrives in Moscow and confronts Nikolai, who got killed by her. After she defeated the remaining guards in the palace, Vasilisa reunites with Krans. She then contacts Matthai to work with her to bring down the Star of Bethlehem. Vasilisa returns in New Testament: A Certain Magical Index light novel series as Kran's bodyguard during his visit to the United Nations headquarters. She is later sent to Denmark by the Patriarch to deal with Tōma and Othinus but she retreats after he defeated the leader of the Russian Orthodox Church. She is present near Egeskov Castle and observes afar Tōma's rescue of Othinus.

Sasha Kreutzev (サーシャ＝クロイツェフ, Sāsha Kuroitsefu)

Voiced by: Yuka Terasaki (Japanese); Kate Oxley (English)

Sasha is a thirteen-year-old Russian nun and an operative of Annihilatus. She is always seen carrying around a large number of magical torture weapons such as hammers and saws. She usually converses in a question-and-answer format. In the Angel Fall story arc, Sasha's body is taken over by Archangel Gabriel, who was called down to earth from heaven by the Angel Fall spell. After the events, she is placed under observation in Moscow due to the unusual effects her body suffered when the archangel possessed it. In the British Royal Family story arc, Sasha is told by Vasilisa to escape the Russian Orthodox Church because an order has been issued for her capture due to the residual Telesma left by Archangel Gabriel in her body. She later encounters Vento, who arrived in Russia to capture Fiamma, and is advised by her to seek asylum in Elizalina Alliance of Independent Nations. In the World War III story arc, Sasha gets captured by Fiamma to be used for his Project Bethlehem but she later manages to escape the Star of Bethlehem. She returns in New Testament: A Certain Magical Index light novel series as part of Krans' security detail during his visit to the United Nations headquarters. She later accompanies Vasilisa in Denmark to capture Tōma and Othinus but she retreats after he defeated the Patriarch's spell against him. She watches afar Tōma's rescue of Othinus near Egeskov Castle.

Skogsfru (スクーグズヌフラ, Sukūguzunufura)

Skogsfru is an operative of Annihilatus, based on Russian folklore about a fairy who lived in the woods and fell in love with a human. Her magic uses sexual spells. In the British Royal Family story arc, Skogsfru is sent by Nikolai to acquire Sasha but she encounters Vasilisa instead, and the two fight until she gets defeated when Vasilisa blew up the room with her spell.

Saronia A. Irivika (サローニャ＝Ａ＝イリヴィカ, Sarōnya A Irivika)

Saronia is a former member of the Russian Orthodox Church who disappeared in her mission in Vladivostok during World War III. She becomes a member of GREMLIN to fulfill her goal of making Russia continue its fight against Academy City. She bases her magic around the legend of the forest spirit Leshy to mind control people. Saronia debuts in the third volume of New Testament: A Certain Magical Index light novel series as the primary antagonist.

Return of the Winged One (翼ある者の帰還, Tsubasa aru Mono no Kikan) is an Aztec-based magic organization. This organization has almost complete control over Latin America, though not to the extent like the Christian churches which could influence the government.

Etzali (エツァリ, Etsari)

Voiced by: Daisuke Kishio (Japanese); Justin Pate (English)

Etzali is a magician of Return of the Winged One who disguised himself as Mitsuki. His name is likely based on the sixth month of the Aztec calendar. He uses a copy of the obsidian spear of the Aztec god representing Venus called the "Spear of Tlahuizcalpantecuhtli" (トラウィスカルパンテクウトリの槍, Torawisukarupantekūtori no Yari) that used the light from the said planet to destroy anything it falls upon. He is sent to Academy City as a spy to stop and undermine the Kamijō Faction, a group of espers and magicians who were acquaintances of Tōma and were supposedly led by him since they see the group as a threat to the truce between science and magic sides.

In the Three Stories story arc, Etzali borrows the appearance of Mitsuki and attempts to befriend Mikoto to kill her but he ends up falling in love with her instead. After he failed to kill Tōma, Etzali makes him promise to protect Mikoto and the world around her. In the Skill-Out Uprising story arc, he stays in Academy City and joins GROUP to protect Mikoto from the shadows. In the Battle Royale story arc, Etzali is tasked by Motoharu to investigate Management's apartment. He takes the appearance of Yamate when his fellow operatives from BLOCK stormed the place and infiltrates the team's hideout to investigate their plan. He later encounters Xochitl, who arrived to kill him due to his betrayal with the magic cabal, at District 10's Reformatory but he defeats her and takes away her grimoire as it erodes her body. In the DRAGON story arc, Etzali and his fellow GROUP operatives infiltrate Shiokishi's base to find information about DRAGON. He meets Tecpatl, who disguised as one of Shiokishi's bodyguards to kill him with Tochtli's grimoire. He manages to use his experience from his encounter with Xochitl's grimoire to defeat and kill him instead.

Etzali returns in New Testament: A Certain Magical Index light novel series during the Homecoming story arc when he visited Xochitl and Tochtli in a hospital and had a debate with them over his continuous use of Mitsuki's appearance.

In Genesis Testament: A Certain Magical Index light novel series, Etzali and Xochitl head to the hospital where Tochtli rest to retrieve the latter as Operation Handcuffs against Academy City's dark side is being commenced.

Xochitl (ショチトル, Shochitoru)

Voiced by: Hitomi Ōwada (Japanese); Jill Harris (English)

Xochitl is a magician of Return of the Winged One known as "Corpse Worker" (死体職人, Shitai Shokunin, lit. "Corpse Artisan") due to her magic ability to retrieve a dead person's will to verify if it is correct after they died. Her name means "flowers" in the Nahuatl language. She uses Macuahuitl as her primary weapon.

In A Certain Scientific Railgun SS: Liberal Arts City side story, Xochitl arrives in Liberal Arts City to sink the artificial island and meets Ruiko during her field trip. She saves Ruiko from the United States' attempt to kill her. Xochitl's plan for the city is foiled by Mikoto's intervention. She is given a new order to destroy all evacuation ships to prevent leakage of Aztec knowledge but she disagrees and decides to defy Tecpatl's order despite knowing that she will be punished. As her punishment, Xochitl has a grimoire merged into her and is sent to Academy City to kill Etzali for his betrayal of the Aztec magic cabal and ends up joining MEMBER. In the Daihasei Festival story arc, she receives help from Ruiko as she tries to operate her unique cellphone. She saves her from an attack by Mitori's liquid metal puppet inside the liquid metal factory. In the Battle Royale story arc, Xochitl battles Etzali at District 10's Reformatory. However, with the grimoire draining away her life, she loses to him and is saved by him after he took possession of her grimoire. In the DRAGON story arc, Xochitl is confined in a hospital and meets Etzali and his fellow GROUP operatives.

In New Testament: A Certain Magical Index light novel series, Xochitl shares her hospital room with Tochtli. She argues with Etzali about his continuous use of Mitsuki's face in front of them.

In Genesis Testament: A Certain Magical Index light novel series, Xochitl uses a borrowed face to hide her identity and accompanies Etzali to retrieve Tochtli in the hospital as Anti-Skill targets members of Academy City's dark side during their Operation Handcuffs.

Tecpatl (テクパトル, Tekupatoru)

Voiced by: Junichi Yanagita (Japanese); Ian Ferguson (English)

Tecpatl serves as the leader of Return of the Winged One. He wields the Moon Rabbit (月のウサギ, Tsuki no Usagi, lit. "Rabbit of the Moon") grimoire, a derivative of the Aztec calendar stone based on the legend of the fifth sun's creation.

In A Certain Scientific Railgun SS: Liberal Arts City side story, Tecpatl leads the operation to destroy Liberal Arts City due to his belief in living peacefully once the battle with the United States that he referred to as "World Police" ends. In the DRAGON story arc, he takes the appearance of Shiokishi's bodyguard named Minobe to hunt down Etzali. After he injured Shiokishi, Tecpatl challenges Etzali but he is killed by him instead.

Tochtli (トチトリ, Tochitori)

Voiced by: Ayasa Itō (Japanese); Ariel Graham (English)

Tochtli is a magician of Return of the Winged One and Xochitl's partner. Her name means "rabbit" in the Nahuatl language.

In A Certain Scientific Railgun SS: Liberal Arts City side story, Tochtli flies the organization's plane called "Mixcoatl" to retrieve Xochitl who got stranded in Liberal Arts City and notes Ruiko's kindness towards her partner. She later supports Xochitl's decision to allow the civilians to evacuate the artificial island. As punishment for disobeying their orders, Tochtli is sedated to allow Tecpatl to use her bones as materials his grimoire used to attack. In the DRAGON story arc, she appears alongside Tecpatl as they confront Etzali. Tochtli is saved by Etzali after he killed the Aztec leader.

In New Testament: A Certain Magical Index light novel series, Tochtli recovers in the hospital where Xochitl was confined. She addresses Etzali as her older brother and tells him to continue visiting them for her to have a peaceful hospitalization. She annoyingly teases Xochitl about Etzali's advantage of using Mitsuki's appearance.

In Genesis Testament: A Certain Magical Index light novel series, Tochtli joins Etzali and Xochitl in watching the sunrise as they ponder the future aftershock of the failed Operation Handcuffs.

The Maiden of Versailles (ヴェルサイユの聖女, Verusaiyu no Seijō)

Voiced by: Yuka Keichō (Japanese); Mikaela Krantz (English)

The Maiden of Versailles is the unnamed mysterious blonde, blue-eyed twin sister of Elizarina and one of the most powerful magicians in Europe. Both she and her sister descend from both the British and French royal families. She secretly rules France despite being placed under house arrest by the French government to serve as a ruse to fool her enemies. The Maiden of Versailles wields the magical sword Durendal.

In the World War III story arc, the Maiden of Versailles leads the French invasion forces to fight against the British forces in the Battle of Dover Strait. She clashes with Carissa but she later works with her to defeat the sudden appearance of Archangel Gabriel. The Maiden of Versailles and Carissa work together to protect targeted Russian and Academy City forces from the archangel as English and French forces evacuate them.

In New Testament: A Certain Magical Index light novel series, the Maiden of Versailles represents France during an allied conference in the United Nations headquarters alongside representatives from Russia, the United Kingdom, the United States, and Vatican City to plan their attack against GREMLIN. After they witnessed Tōma's efforts in saving Othinus, the Maiden of Versailles mentions to her allies her decision to not send someone to go after Tōma in the first place when he suddenly allied with the Magic God.

Musset (ミュッセ, Myusse)

Voiced by: Eiichirō Tokumoto (Japanese); Stephen Fu (English)

Musset is a French terrorist and member of a French anti-English organization. In the British Royal Family story arc, he boards the Sky Bus 365 plane to sabotage its flight stabilizers near Tōma's seat. He later strangles Index, who witnessed his activity, inside a storage closet but he is attacked by Tōma to save her. Musset's plan to sabotage United Kingdom's air routes is finally foiled by Tōma and Necessarius.

Eiker Lugoni (エーカー＝ルゴーニ, Ēkā Rugōni)

Voiced by: Takahiro Shimada (Japanese); Jim Johnson (English)

Eiker is a French terrorist and member of a French anti-English organization. In the British Royal Family story arc, Eiker patiently waits in the cargo hold of the Sky Bus 365 plane with explosives. He is knocked down by Tōma but he manages to get up and grab a grenade. He is suddenly sucked in by a hole that Stiyl had blown on the side of the plane. His grenade is knocked away by Tōma as he screams in pain.

Cendrillon (サンドリヨン, Sandoriyon)

Cendrillon is a young blonde French magician. Her name is the French word for Cinderella. She uses the story of Cinderella to transform parts of it into an attack spell but her magic ability has a time limit of "midnight".

Cendrillon is first introduced in the third volume of New Testament: A Certain Magical Index light novel series as a member of GREMLIN who was sent by the group to stop the bomb that Leivinia set up in New Honolulu International Airport. She defeats her guards using a spell based on Cinderella's glass slipper that forcibly widened or reduced their feet sizes into her foot size of 22.5 centimetres (8.9 in). She is defeated by Leivinia when the latter rammed a jet fuel tanker into her but she is left heavily bleeding after Saronia used a spell to force her into injuring herself as a means of silencing her. Cendrillon appears to have survived her predicament and is being held by American forces alongside Saronia. She escapes her imprisonment and upon confronting Marian, becomes angry at GREMLIN for their denial of helping her to turn the United States into a theocratic country. She attacks Marian but she gets defeated by her, who planned to turn her into furniture. In the Baggage City story arc, Cendrillon reappears in the form of a table inside Marian's room. In the Ichihanaran Festival story arc, Cendrillon's body is reconstructed with the help of an unaware Shizuri when the "ingredients" for her body parts were sent to Academy City. She then encounters an injured Tōma, whom she needed for her revenge against GREMLIN. Upon hearing Tōma's mention of defeating Marian back in Baggage City, Cendrillon agrees to help him by creating a brain from her leftover ingredients for Fräulein to eat instead of Last Order's brain.

GREMLIN (グレムリン, Guremurin) is a group of magicians formed after World War III to oppose Academy City and the major group antagonist of New Testament: A Certain Magical Index light novel series. Their organization name is based on the folkloric creature of the same name. GREMLIN has several followers, including other magicians, who desired the destruction of Academy City.

Othinus (オティヌス, Otinusu)

Voiced by: Asami Seto

Othinus is the leader of GREMLIN and the current Magic God, with her name equivalent to the Latin translation of Odin. She is always seen wearing an eye patch to cover her right eye.

Othinus makes her debut in the fourth volume of New Testament: A Certain Magical Index light novel series when she arrived in Baggage City to confront Tōma then she crushes his right wrist and severs his hand. She makes timid with Ollerus but she withdraws when he revealed the presence of Fiamma and his power currently not negated by Tōma's destroyed right hand. She then raises Kagun from the dead to become an einherjar. In the Ichihanaran Festival story arc, Othinus meets up with GREMLIN members at a port in Tokyo Bay and cuts off the right arm of Thor, who revealed to be Ollerus in disguise, as punishment for his failure to capture Fräulein. In the Magic God Othinus story arc, Othinus destroys the whole universe using the Lance of Gungnir and recreates many worlds for Tōma to be tormented and driven into suicide. After he died in their looping fight later, she realizes Tōma is the only person who could understand her and decides to return him to his original world. Othinus accepts Tōma's help to retrieve her right eye in a lake near Egeskov Castle for her to become human again. At the end of their journey in Denmark, she turns into a fifteen-centimeter fairy and begins to live with him in his dormitory. Othinus calls Tōma her human "understander". In the Mental Out story arc, Othinus becomes displeased at Tōma, who sneaked out of his hospital room last night, for removing his cast. In the St. Germain story arc, Othinus pushes Tōma to buy her a dollhouse to keep herself safe from Sphynx. She later helps him in his fight against St. Germain who took over the Dianoid building. In the World Rejecter story arc, Othinus tags along with Tōma on his way to buy ingredients and encounters Kakeru. In the Salome story arc, Othinus secretly sneaks into Tōma's bag and reveals herself in front of his classmates upon their arrival at his class' temporary school. In the Element story arc, Othinus stays in Tōma's temporary school as she experiences the heatwave and looks after Sphynx. In the Kamisato Rescue story arc, Othinus waits alongside Index for Tōma to arrive at District 7's station plaza per his message. She later bites him upon his return to the school due to his failure to meet her up earlier. In the Aleister Crowley story arc, Othinus joins Tōma and his friends in infiltrating the Windowless Building to find a way to remove the cursed magic sword from Maika. In the Processor Suit story arc, Othinus reunites with Tōma at Heaven Canceller's hospital after they got separated the whole day since the launch of the Windowless Building outside Earth. In the Coronzon story arc, Othinus joins Tōma on his quest in the United Kingdom to defeat Coronzon. In the Kamijō story arc, Othinus helps Tōma to confront his doppelganger inside the Windsor Castle.

Othinus returns in Genesis Testament: A Certain Magical Index light novel series when she helped Tōma to defeat Norito using her knowledge as a Magic God. She encounters Anna and witnesses her kiss with him. She becomes furious at Anna for infecting Tōma with a St. Germain virus and discusses the situation with Index, who prayed in the altar inside Heaven Canceller's hospital. She then works with Index to save the patients who got injured from the magic they learned at R&C Occultics' website.

Thor (トール, Tōru)

Voiced by: Soma Saito

Thor is the representative combat member of GREMLIN, based on the Norse god of thunder and lightning of the same name. In the Ichihanaran Festival story arc, he disguises himself in the form of Mikoto and meets up with Tōma. When his identity got revealed, Thor requests Tōma's help in saving Fräulein inside the Windowless Building. Thor later reveals his intention behind saving Fräulein is to simulate his power growth through real-life battles. Thor uses electric arc blades in his fight with Tōma. He allows Ollerus to borrow his appearance for the latter to sneak in the GREMLIN and ponders whether he will continue his operations as a GREMLIN member after he betrayed them. In the Magic God Othinus story arc, Thor shows up at the Egeskov Castle and defeats GREMLIN members who planned to kill Othinus for her betrayal. He fights Tōma for the second time but he is eventually defeated yet satisfied with the battle experience he gained.

Marian Slingeneyer (マリアン＝スリンゲナイヤー, Marian Suringunaiya)

Voiced by: Hiromi Igarashi

Marian is a Dvergr and a key member of GREMLIN. She serves as Kagun's mentor after he left Academy City, becoming closer to him than to any other GREMLIN members. Her magic allows her to transform people into objects. Marian possesses Dáinsleif but she is instructed by Othinus to not remove the sword from its scabbard.

Marian is introduced in the third volume of New Testament: A Certain Magical Index light novel series after the events that transpired in Hawaii. She encounters Cendrillon and tells her that GREMLIN never intended to go with her plan of turning the United States into a theocratic state, causing the French magician to attack her but she defeats her and wonders whether to transform her into a wardrobe or table. In the Baggage City story arc, Marian fights Byōri Kihara and defeats her at the garbage incinerator. She later encounters Maria and a Kōga ninja named Shuri Ōmi but she struggles to defeat Maria due to her esper ability. Marian witnesses Kagun's death and begins to mentally break down as she prepares to use Dáinsleif but she is defeated by Tōma. She sees Kagun carrying her after Othinus turned him into an einherjar. In the Ichihanaran Festival story arc, Marian arrives at Academy City alongside Thor and Mjölnir for their mission to retrieve Fräulein inside the Windowless Building but she falls into Tōma's trick when she found her wanted poster from Anti-Skill due to her involvement in Baggage City. She is later knocked down by Thor in her hideout. In the Magic God Othinus story arc, Marian begins to create the Lance of Gungnir for Othinus. When Othinus returned Tōma to his original world, Marian heads to Denmark to hunt down the Magic God and ends up fighting Tōma but she is knocked down during the battle with her summoned beings.

Mjölnir (ミョルニル, Myoruniru)

Mjölnir is a female magician of GREMLIN in cylindrical form and Marian's partner, based on Thor's hammer of the same name. Her appearance is caused by Marian's magic power and can change into other shapes such as a sphere and a cube.

Mjölnir is introduced in the second volume of New Testament: A Certain Magical Index light novel series on-board the Radiosonde Castle. In the Hawaii Invasion story arc, she accompanies Marian and is used by her to defeat Cendrillon. In the Ichihanaran Festival story arc, Mjölnir accompanies Thor and Marian on their mission to retrieve Fräulein inside the Windowless Building. She witnesses Thor knocking down Marian but she is convinced by him to not endanger her partner since she is needed for the creation of the Lance of Gungnir. In the Magic God Othinus story arc, Mjölnir decides to not fight Tōma and picks up the defeated Marian to retreat.

Útgarða-Loki (ウートガルザ・ロキ, Utogaruza-Roki)

Útgarða-Loki is an illusionist of GREMLIN, based on the ruler of Útgarða of the same name. He is sent to Baggage City and deals with a representative of Science Guardian until he is interrupted by the arrival of Ransū Kihara.

Fenrir (フェンリル, Fenriru)

Fenrir is a member of GREMLIN, based on the Norse mythological wolf of the same name. He is sent to Alaska to destroy the anti-GREMLIN force's NORAD base to cut off their intelligence network and encounters Oriana, who arrived to stop his plan.

Freyja (フレイヤ, Fureiya)

Freyja is a fetus magician of GREMLIN, based on the Norse fertility goddess of the same name. She resides in her mother's womb and takes over her body to save her from death. She uses a spiritual item called "Brísingamen" to summon creatures. In the Magic God Othinus story arc, Freyja summons Níðhöggr that destroyed Tōma and his friends' plane over Tokyo during the invasion of GREMLIN in the city. She later fights Tōma, Index, and Mikoto above the moving train but she eventually ceases being antagonistic when he convinced her that she did not need Othinus' power to ensure her mother's safety.

Hel (ヘル, Heru)

Hel is a member of GREMLIN, based on the Norse goddess of death of the same name. She is tasked to destroy the allied force's supply ships and routes in the Pacific Ocean to cease their ammunition supply but her plan is intercepted by Silvia and Brunhild.

Loki (ロキ, Roki)

Loki is a member of GREMLIN, based on the Norse god of trickery of the same name. He reveals to be the one who cunningly deceived world leaders of Sargasso's location and led Carissa, Acqua, and the Knight Leader to invade the North Sea around Iceland instead of Tokyo Bay.

Jörmungandr (ヨルムンガンド, Yorumungando)

Jörmungandr is a member of GREMLIN, based on the Norse sea serpent of the same name. He intercepts the incoming Russian bombers to prevent them from interfering with GREMLIN's invasion of Tokyo and encounters Stiyl with his Innocentius.

Ollerus (オッレルス, Orrerusu)

Voiced by: Nobunaga Shimazaki (Japanese); Brad Hawkins (English)

Ollerus is a magician who once had the chance to become a Magic God instead of Othinus, with his name based on Ullr. His magic ability is called "Hliðskjálf" that could change life energy and normal magical power into an unexplainable type of power. His power is so considerable that when Gunha fought him seriously, Ollerus only toys with him during the battle. He is currently being pursued by various magical organizations that sought his power but he manages to elude them. Ollerus is accompanied by Silvia, who acted cruelly to him on the surface yet still deeply cared for him.

Ollerus makes an appearance in the final episode of A Certain Magical Index III anime series when he and Silvia found an injured Fiamma. He returns in the fourth volume of New Testament: A Certain Magical Index light novel series when he arrived in Baggage City to confront Othinus, who recently crippled Tōma's right hand. After the confrontation, Ollerus helps in restoring Tōma's destroyed hand and undoing Marian's spell to her victims that included Cendrillon. In the Ichihanaran Festival story arc, Ollerus and his team consisted of Fiamma, Silvia, Brunhild, and Leivinia arrive in Academy City to foil GREMLIN's plan of retrieving Fräulein inside the Windowless Building. He later meets Tōma being tasked by Seiri to buy food for the class. At the end of the fight between his group and GREMLIN, Ollerus successfully disguises himself as Thor and offers Othinus the organs of Teitoku as the replacement for Fräulein to create a holistic esper. In the Magic God Othinus story arc, Ollerus is present in Sargasso located at Tokyo Bay and secretly sends a message to the Church of England about its location. Before Othinus destroys the whole universe with her Lance of Gungnir, he and Fiamma work together to stab her with a spell that could transform her into a fairy. In Denmark later, Ollerus shows up to stop Silvia and Brunhild from killing Tōma and Othinus.

Brunhild Eiktobel (ブリュンヒルド＝エイクトベル, Buryunhirudo Eikutoberu)

Brunhild is a magician from Finland who served as a Saint and a Valkyrie at the same time, with her name likely based on Brunhild. She has very long and curly blonde hair and wears clothes similar to the Valkyries from Norse mythology. She uses a big sword and the replica of Odin's spear. As she possesses the quality of a Christian Saint, which was deemed to be foreign by the Norse societies, Brunhild has been a target to kill since a young age, resulting in the deaths of people around her. She eventually decides to replicate the Gungnir to hopefully save a boy named Ceillier Flatley who fell in a coma due to attempted suicide as a result of the guilt from serving as a tool to make Brunhild mentally suffer under the Five Great Norse Societies, which managed to capture her by the time both of her powers conflict thus canceling out each other. After she recovered her power, Brunhild destroys the Five Great Norse Societies: "Those Who Nurture the World Tree", "The Knowledge Carved Into Iron", "The Champions Rising from the Sea", "Those Who Know the Words of God's Sword", and the "Golden Forged Hammer in the Earth" but she is eventually defeated by Kaori after several battles. However, she manages to save Ceillier from his comatose after she figured out the true nature of the magic that resulted in his state.

In the fourth volume of New Testament: A Certain Magical Index light novel series, Brunhild fights the artificial Valkyries sent by GREMLIN while visiting Ceillier in a hospital but she is outnumbered until Silvia and Leivinia arrive to help her. In the Ichihanaran Festival story arc, Brunhild is part of Ollerus' group that arrived at Academy City to stop GREMLIN's plan of retrieving Fräulein. She later fights Mikoto but she stops when Leivinia got defeated by Tōma and leaves Academy City along with Leivinia and Silvia. In the Magic God Othinus story arc, Brunhild arrives in Denmark with Silvia to hunt down Tōma and Othinus and witnesses her partner's gruesome beating of him as she prepares to kill the Magic God.

The Amakusa-Style Remix of Church is a secret order of Japanese warriors. The order was formed during the Edo period when Japan banned Christianity. To escape persecution, they merge Shintoism and Buddhism into their Catholic beliefs to hide their religion which led the Amakusas to create a unique fusion of magic. While skilled sorcerers, the Amakusas are also skilled with martial arts and fighting in groups.

Kaori Kanzaki (神裂 火織, Kanzaki Kaori)

Voiced by: Shizuka Itō (Japanese); Morgan Garrett (English)

Kaori is an eighteen-year-old Japanese sorceress from Necessarius. Unlike her partner Stiyl, she uses magic to magically strengthen her body. Her sorcery name is Salvare000, "Be the salvation of those who cannot be saved" (救われぬ者に救いの手を, Sukuwarenu Mono ni Sukui no Te o). She uses a two-meter-long nodachi called "Seven Heavens Seven Swords" as her weapon. She has a special attack called Nanasen (七閃, "Seven Flash") that uses her sword and some wires. She is to be a kind woman who treats Index like a sister, but when Index's memories are erased by Necessarius, Kaori becomes a ruthless and silent woman as Index is unable to remember her and consequently distrusts her. After Tōma rescues Index and her current memories, she decides to let Index stay at Academy City as she feels Tōma can protect her.

Later in the novels, more of her past is revealed. Not only is Kaori a skilled swordswoman, but she is a Catholic Saint possessing the "Stigma" — the ability to call upon God's power — and the former leader of the Amakusa Catholics; however, Kaori leaves the group as she resents that she has been fated since birth to become its leader, which leads to her resenting the concept of luck and fortune. Though she is Catholic, she joins Necessarius in hopes of changing her fate and befriended Index, developing a sisterly relationship with her. The repeated failed attempts to make Index remember her after each memory erasure results in Kaori beginning to accept that no matter how much a person tries, no one can change their destiny. However, Kaori begins to show a kinder side to herself after Tōma rescues Index, giving her hope that anyone can defy their destiny, and eventually falls in love with him after he helps her reunite with the Amakusa Catholics, becoming more prone to showing emotion and sometimes showing a little embarrassment if she is with him. She is the protagonist of her spin-off mini-light novel bundled with the A Certain Scientific Railgun DVDs.

Saiji Tatemiya (建宮 斎字, Tatemiya Saiji)

Voiced by: Kōsuke Toriumi (Japanese); Duncan Brannan (English)

The substitute-Supreme Pontiff of the Amakusa Catholics, who saves people for the sake of saving them rather than for any ulterior motive. A capable leader, he strives to rebuild the group so that Kaori, who left the group and rejected the position of Pontiff to protect them from any incidents that would occur as a result of her status as a Saint, would feel welcome to return to them someday. He has impressionable pitch-black hair and a unique sense of fashion, which includes an over-sized shirt and one-meter long shoelaces. Saiji is an expert in Amakusa-style combat and is equipped with a 180-centimeter-long Flamberge.

Itsuwa (五和, Itsuwa)

Voiced by: Ai Kayano (Japanese); Krishna Smitha (Season 2), Amanda Lee (Season 3) (English)

An Amakusa girl. Originally introduced in the eleventh novel, she makes an earlier appearance in the anime episode "The Book of the Law" which is based on the beginning of the 7th novel. In the 11th novel, she fell in love with Tōma after their first meeting, claiming it was love at first sight but the anime suggests she fell for him much earlier during the Orsola incident in the seventh novel. However, due to her shyness, she is unable to properly tell him how she feels. Yet she hopes to get Tōma's attention, even when knowing her senpai and superior Kaori is also in love with him. She has accompanied Tōma and his friends on more than one occasion, including traveling with him to Italy, France, and Britain. In the events of the 16th novel, she becomes his bodyguard and caretaker. When Acqua first attacks Academy City, she fails to protect him and tries to heal Tōma with magic but unsuccessfully due to his Imagine Breaker. After Tōma is sent to the hospital she goes into despair for failing to protect him but Saiji rebukes her and tells her to snap out of it as she focuses on fighting with Acqua if she wants to protect him. During the Amakusas' rematch against Acqua, Itsuwa suddenly displays a change of personality, becomes full of tranquil fury that even the way she spoke changed. She performed a "Saint Destroyer" spell in that battle, harming Acqua and causing him to lose the "Divine Mother's Mercy" spell which allows them to defeat him.

Her weapon is a Friulian Spear, which by adding layers of reinforcement magic, turns it into a symbol of a 'Thousand Years Tree', which symbolizes the growth of plants and makes certain magic spells to be more potent over time. She also can perform Nanasen (七閃, "Seven Flash") by manipulating her spear and steel wires just like Kaori.

Tōya Kamijō (上条 刀夜, Kamijō Tōya)

Voiced by: Kenji Nomura (Japanese); Christopher Sabat (English)

Tōma's father. He is a businessman who travels a lot and collects various good luck charms due to Tōma's unnatural streak of bad luck. Though he may seem silly at times he does care about his wife and son. He is partly responsible for causing Angel Fall, the spell that brought a powerful angel in heaven to Earth without his knowing about it. In his youth, he was a playboy but fell in love with his future wife Shiina. Despite being happily married and having no interest in other women, he still manages to attract women, much to the chagrin of his wife.

Shīna Kamijō (上条 詩菜, Kamijō Shīna)

Voiced by: Kikuko Inoue (Japanese); Lydia Mackay (English)

Tōma's mother. She has a gentle personality and cares about Tōma. She commonly uses the phrase "Ara-ara", which is the equivalent of saying, 'My, my" in English. While she is usually seen as calm and sweet, she can be jealous if another woman is interested in her husband. Since the sports festival, she has become good friends with Misuzu Misaka.

Misuzu Misaka (御坂 美鈴, Misaka Misuzu)

Voiced by: Emi Shinohara (Japanese); Barrett Nash (English)

Mikoto's mother, who is currently studying in college. Due to her youthful looks, she is generally mistaken as Mikoto's older sister. She is aware that her daughter likes Tōma. Since the sports festival, she has become good friends with Shīna Kamijō.

Tabikake Misaka (御坂 旅掛, Misaka Tabikake)

Mikoto's father, who is a rich and prominent businessman who meets Tōya during a business trip in one of the side-story chapters. He has been employed to find and correct flaws in the world and is currently investigating Gemstone espers to prevent them from falling into the hands of governments and agencies unaffiliated with Academy City. Tabikake has numerous connections worldwide and access to Aleister, whom he does not hesitate to threaten when he suspects that Aleister might use his wife and daughter in his plans.