Characters

Students and Residents
Touma Kamijo (上条 当麻, Kamijō Tōma)

Voiced by: Atsushi Abe
 * see full article: Touma Kamijo

The series' main protagonist. He has the lowest psychic rank possible at Level 0— largely because the people testing psychic abilities cannot detect or classify his abilities. Due to this, the founder of Academy City considers him neither a Psychic nor a Magician but rather a normal person with a unique ability.

His power is Imagine Breaker (幻想殺し,Gensou Goroshi, "Imagine Killer"), a power which negates all magic, psychic, or divine powers but also his own good luck.

Throughout the series, he tries to live his life normally while still facing against the many adversaries from the worlds of science and magic and the conflicts that follow. Despite his very bad luck, he has managed to get the interests and hearts of many ladies who are infatuated with him, which Aisa jokes about, that his life is like a dating sim where he is bound to unlock more paths to more girls.

Mikoto Misaka (御坂 美琴, Misaka Mikoto)

Voiced by: Rina Satou
 * see full article: Mikoto Misaka

A psychic user of Academy City, her powers are ranked Level 5, the highest rank for the most powerful psychic users, and she ranks as third-strongest out of the seven people who hold this rank in Academy City.

She attends Tokiwadai Middle School, a famous school in Academy City for the rich and elite psychics. To most people, she is considered a proper lady, but in reality, she has a short-tempered, prideful, and improper attitude with some slight tomboyish tendencies and insecurities, a fact few people know; despite this, she has a strong sense of morals and hates injustice, contrary to what she claims. Proof that she is a righteous person, she was willing to die in the first move in a fight against Accelerator to prove the 'Sisters' Project wrong and save her remaining 9968 sisters.

Her power is to generate electricity; she is powerful enough to cause a blackout in the city and make instant railguns by using coins as projectiles.

Kuroko Shirai (白井 黒子, Shirai Kuroko)

Voiced by: Satomi Arai
 * see full article: Kuroko Shirai

Misaka's kōhai in Tokiwadai Middle School. A Level 4 psychic, she is a member of Judgment, a special public committee group whose duty is to maintain peace and order in Academy City. She is in love with Misaka, who she calls "Onee-sama" (big sister), and tends to get jealous if someone else gets her attention; this unfortunately happens to be Tōma since he has caught the attention of Misaka for various reasons. Her powers are instant teleportation, which allows her to teleport herself and anything in her possession as long it weighs around 130-137 kilograms to anywhere in a radius of around 81-85 meters. One disadvantage of her power is that she has to concentrate on where she, the object(s), and/or person she holds would be teleported to, for any disturbance in her concentration will make her powers useless.

Kazari Uiharu (初春 飾利, Uiharu Kazari)

Voiced by: Aki Toyosaki

Shirai's friend and colleague in Judgment and another protagonist in To Aru Kagaku no Railgun. Shy and humble, she goes to a different middle school from Shirai and is known for wearing a headband made of flowers on her head (and sometimes a surgical mask, as she constantly suffers the flu). She has a sweet tooth but is always called for Judgment duties before she can enjoy her sweets. Her powers are currently unknown, but she displays various skills with the use of computers, such as repelling hackers and gathering information. She makes a cameo appearance in the opening of the anime and appears in the animated Railgun spinoff.

Ruiko Saten (佐天 涙子, Saten Ruiko)

Voiced by: Kanae Itō

A Level 0, classmate, and Uiharu's friend who is known for wearing a flower on the left side of her hair. She is a little shameless as she sometimes flips Uiharu's skirt in public. When rumors of a special tool that increases psychic powers called the "Level Upper" spread, she considers obtaining it out of envy as she does not have any apparent powers. When she uses it, Ruiko consequently winds up in a coma and gradually recovers thanks to the help of the creator of the 'Level Upper'. She first appears in the To Aru Kagaku no Railgun manga and its anime series and makes a cameo appearance in the To Aru Majutsu no Index light novel series and the opening of the anime.

"Blue Hair and Piercings"  (青髪ピアス, Aogami Piasu)

Voiced by: Yoshihisa Kawahara

His real name is unknown. Tōma's friend and classmate. A funny individual who tends to see Tōma's bad luck, who he calls "Kami-yan" in a different way. He is a self-confessed pervert, lolicon, and masochist who enjoys being punished by his teacher, Tsukuyomi. He is always seen with Motoharu. He, Motoharu, and Tōma are known as the three idiots in their class as not only do they have the lowest test scores, but they are also Level 0s (except the latter two have good reasons for being that way).

Motoharu Tsuchimikado (土御門 元春, Tsuchimikado Motoharu)

Voiced by: Anri Katsu
 * see full article: Motoharu Tsuchimikado

A blonde teenager who is always seen with sunglasses and wearing an Aloha shirt. He is a friend and classmate of Tōma who just happens to be his next-door neighbor at the dormitory they're staying at. While he seem like a normal, average teenager, there's more to him than meets the eye. Secretly, Tsuchimikado is actually a former agent of Necessarius who became a freelance spy for Necessarius, Academy City, and other unknown organizations; the leaders of both Necessarius and Academy City are both aware of this but have decided to let him be for the time being. His sorcery name is Fallere825, 'the back-stabber'.

He was formerly a skilled Onmyōji as his family are descendants of Abe no Seimei but gave up his abilities when he went under the ESP development curriculum. He has a younger step-sister named Maika, whom he is also in love with, and for this he is known as the Shisukon Gunsō (シスコン軍曹, "Sis-com Sergeant"?). He is also a member of one of Academy City's secret organizations, the "GROUP". His ESP ability is the Level 0 Auto Regeneration (肉体再生, Nikutai Saisei?, lit. "Body Regeneration"). Due to this power, he can still use magic as he can repair the damage done to his body, making him the only successful psychic/magician hybrid. Despite these advantages, he avoids using magic except in the most desperate situations as he cannot avoid the extreme pain caused by using it.

Aisa Himegami (姫神 秋沙, Himegami Aisa)

Voiced by: Mamiko Noto
 * see full article: Aisa Himegami

A quiet young girl with a rather blunt personality who wears Miko attire. While she may seem normal, she is also known as "Deep Blood" and has the ability to kill vampires when they approach her, as her blood's smell attracts them. However, it made her miserable because, aside from sucking blood, vampires were just like humans. This prompts her to go to Academy City, hoping to find a way to get rid of her powers, until she meets the alchemist Aureolus Izzard. She cooperates with him because he told her that her blood can be used to save the life of a person he cared for (Index) in return for helping her get rid of her powers.

When Aureolus learns Index's life was already saved by Tōma and tries to kill him, Aisa attempts to defend Tōma, which prompts Aureolus to use his alchemy to try to kill her as she was now useless to him. Her life was saved by Tōma who dispelled the spell on her with his right hand. When she asks Tōma about why he saved her, he told her that he didn't have a reason to rescue her. After the incident, she lives with Tōma and Index but later moves to Komoe's apartment and wears a magical power-blocking cross, which enables her to live what she had always wanted: a normal life. She subsequently becomes a student at Tōma's school and is in his class. Ever since Tōma saved her life, Aisa started to have feelings for him, which is ironic as she once joked that Tōma's life was like a dating sim.

MISAKA (ミサカ)

Voiced by: Nozomi Sasaki
 * see full article: MISAKA

Introduced in both the third volume of the novel and manga, respectively, and episode ten of the anime, Tōma meets the younger 'twin sister' of Mikoto who he calls Misaka's sister (御坂妹, Misaka imōto?), who seems rather quiet and emotionless. Her voice is rather monotonous and computer-like. Her speech pattern is unique, for she talks in third person (adding a description of herself after she finishes talking). Despite this, she has a soft spot for cats. While both sisters may look alike from a distance, if one looks closely, there are a few ways to tell them apart: Mikoto has reddish-brown eyes while Misaka has gray eyes, and the former wears shorts under her skirt while the latter only wears panties. Also, Misaka wears a special set of goggles that enables her to see electron beams and magnetic field lines for the reason that, unlike Mikoto, she does not have that ability. At the beginning of the third volume, Mikoto seems to dislike and worry about Misaka for some reason, and later events reveal why.

Maika Tsuchimikado (土御門 舞夏, Tsuchimikado Maika)

Voiced by: Misato Fukuen

Motoharu's younger step-sister. She wears a maid attire (as she goes to a Maid School) and rides on top of a cleaning 'bot. She has a friendly relationship with Tōma and knows that he has two girls (Index and Aisa) living with him but keeps the secret between her and Tōma and is a good friend of Mikoto as she works at her school. Even though she lives in her school's dormitory, she sometimes goes to live at her brother's apartment; for instance, in episode ten, she stays at said residence because her dormitory's air conditioner breaks down.

Accelerator (一方通行, Ippō Tsūkō, "One Way")

Voiced by: Nobuhiko Okamoto
 * see full article: Accelerator

The most powerful Psychic in Academy City. A sadistic boy about the same age as Tōma, he has an ability called "Redirection", a form of telekinesis. He can change the vector values of anything by touch; for example, he kills a Sister clone by reversing the flow of blood inside her body after putting his finger inside her wound. He can greatly uplift the velocity of wind around him, creating a massive plasma storm. He has to consciously allow gravity to affect him and can block out all sound. Furthermore, this ability is automatic, so projectiles (like bullets) or explosives (like bombs) have no effect on him, as they will be redirected. It is because of his ability that he has an albino appearance (white hair and pale skin), for his body blocks all ultraviolet radiation, thereby preventing the skin from manufacturing melanin.

Last Order (打ち止め, Uchidome, "The End")

Voiced by: Rina Hidaka

Misaka clone No. 20001, she is the administrator of the Misaka Network and the fail-safe mechanism in case the Sisters got out of control. She is not designed to function independently and survive for long outside a culture container and appears to be only about ten years old. Unlike her previous clone sisters, she is capable of showing emotions and has a close relationship with Mikoto, Misaka Imōto, and Accelerator. Like her older clone sisters, she speaks in third person with a description, except she says "Misaka" twice.

Hyouka Kazakiri  (風斬 氷華, Kazakiri Hyōka)

Voiced by: Kana Azumi

She is Index's first "friend" in Academy City. She is gentle but shy. Not much is known about her aside from the fact that she was an overachiever at Kirigaoka Academy for Girls (霧ヶ丘女学院, Kirigaoka Jyogakuin?), according to Aisa. Her ability is Counter Stop (正体不明, Shōtai Fumei?, "Unknown Identity"). Details about her level are unknown but it could be high, since it was mentioned that she was among the top psychics in the Kirigaoka Academy for Girls. It is later revealed that she is not a human at all but instead an algorithm of the psychic's AIM with a conscious. The nature of her being leads her to be indestructible, as she can recreate any damage done to her body and lift objects several times her size.

Seiri Fukiyose (吹寄 制理, Fukiyose Seiri)

Tōma's classmate, Aisa's best friend, and their class representative. She hates people who give up on their life and blame their bad luck on Tōma as she secretly has a crush on him. She is mentioned as the girl who is "pretty but lacks sex appeal". She is a health-product freak and is frequently ordering different health products from the television shopping channels. Her abilities have yet to be revealed.

Necessarius
Index (インデックス, Indekkusu)

 Voiced by: Yuka Iguchi
 * see full article: Index

Index, also known by her full name Index Librorum Prohibitorum, is one of the series' heroines, a young nun from Necessarius (必要悪の教会, Hitsuyōaku no Kyōkai, "Church of Necessary Evil"), a branch of the Church of England. Her mind has been implanted with the 103,000 magical texts of the Index-Librorum-Prohibitorum as she possesses Photographic memory, though at the cost of her own memories (or so the Church says). Her sorcery name is Dedicatus545, "The lamb is devoted to protecting the wisdom of the strongest". The Church says that the grimoires take up 85% of her mind, so she only has 15% of memory space left to use in daily activities, which allows her to live normally for less than a year. However, all of this is revealed to be a lie after Tōma begins to question how the Church even got to numbers like 15% and 85% and finds out from Komoe that the human mind can theoretically store up to 140 years of memories. The Church planned to make the grimoires harder to access by telling its underlings to perform "maintenance" on her mind in exactly one-year intervals once her memory has come to its "limit"; that way, she will not remember her close friends and accidentally and/or purposely reveal the contents of the grimoires.

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

Voiced by: Kishō Taniyama

A sorcerer from Necessarius. His sorcery name is Fortis931, "My name is the strongest proof, here is why". He is an extremely heavy smoker; he claims a world without nicotine would be hell. He specializes in using flames and is able to use a flame sword and summon a 3000-degree-Celsius fire called Innocentius (魔女狩りの王, Majokari no Ō, "King of Witch Hunters") to battle his enemies. Despite his looks, he is actually fourteen years old and is physically weak. He has a short temper but is actually kind, as he cares about Index very much and his failure to save her life without losing her memories was his greatest regret. When he learns the Church lied to him and Kaori about Index's condition, he decides to disobey orders to capture Index and allow her to live her life.

Kaori Kanzaki (神裂 火織, Kanzaki Kaori)

Voiced by: Shizuka Itō
 * see full article: Kaori Kanzaki

An eighteen-year-old sorceress from Necessarius. Unlike her partner Stiyl, she uses magic to magically strengthen her body. Her sorcery name is Salvare000, "The one being saved becomes the hand that saves". 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 used to be a kind woman who treated Index like a sister, but when Index's memories were deleted by Necessarius, Kaori changed into a cold and silent woman as Index no longer remembered her and consequentially did not trust her. After Tōma saves Index's life and her current memories, she decides to stay at Academy City to be with Index and protect her.

Sherry Cromwell (シェリー＝クロムヱル, Sherī Kuromuweru)

Voiced by: Akeno Watanabe

Her sorcery name Intimus115, "Everything I offer to my lost friend". A member of Necessarius and a talented "Decoder", she has tanned skin and wears a black Gothic Lolita dress. Her blonde hair is unkempt and according to Tsuchimikado, she has the silhouette of a lion. She is a master of Kabbalah Statue art and utilizes oil pastel or chalk to draw a spell to summon a golem Sherry refers to as "Ellis".

Sherry appears in Academy City with the intention of attacking a person of importance to either Academy City or the Church in order to cause a conflict- and eventually, war- between the factions. During her assault, she reveals to Toma that she seeks to keep science and magic divided in order to prevent the tragedy that once befell her friend Ellis, who had been sent to the Church from Academy City for an attempt to create a magician-esper hybrid. The incompatibility of science and magic destroyed Ellis, and Sherry believes that it is impossible to reconcile the two forces and that it will only result in terrible pain for others.

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

Voiced by: Ayako Kawasumi

The Archbishop of Necessarius (必要悪の教会, Hitsuyōaku no Kyōkai, "Church of Necessary Evil"). Despite being the Archbishop, she looks like an eighteen-year-old girl with long blonde hair; other than that, any other details about her are unknown. She speaks funny Japanese, courtesy of Tsuchimikado teaching her. She might sound simple and irresponsible, but behind her smile lies a cold and calculating personality. She loves baths and has a collection of the latest bath accessories from Academy City.