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Terminology
An esper (能力者 Nōryokusha?, lit. "Ability User") is an individual who emits AIM. The term is also used to refer to those enrolled in the Academy City Power Curriculum Program​, as well as magicians by those unaware of the magical nature of their abilities, and therefore define them as esper-related. 

TerminologyEdit

The original Japanese light novels used the term "Ability User", but before the licensing of Toaru Kagaku no Railgun, the majority of the English-speaking fandom substituted it with "esper". Because its use has become widespread, this wiki uses the term "esper".

A queer event related to this is Seven Seas' English translation of the first volume of A Certain Scientific Railgun, which opted to use "psychic", a term that has been used before by the fandom until "esper" became the standard. Because of this, the English fans that were accustomed to the use of "esper" lobbied for "psychic" to be changed, and Seven Seas acquiesced, even referencing the incident later.

The term "esper" does not automatically imply ESP, one of the two classifications of powers in Academy City, as it could also refer to an ability user that does not have extrasensory perception but instead influences objects in their surroundings, referred to as Psychokinesis. Abilities such as Pyrokinesis are considered esper powers despite the user not having extrasensory perception.[1]

PrinciplesEdit

AIMDiffusionField AstralBuddyManga

An illustration on how Personal Reality, AIM diffusion field, and esper power interact, as depicted in the Astral Buddy manga.

Espers are described by Index as individuals with "talent"; this likely refers to Gemstone and each cannot use magic without injuring themselves.[2] AIM is emitted by every esper and their power relates to the properties of their AIM. A Pyrokinetic for example will emit AIM that will heat up their environment. Furthermore, espers have a Personal Reality, which is the basis of their abilities and their capacity to substitute reality with their own. It is in contrast with magic's Idol Theory.

Espers can only access one specific power; Misaka Mikoto, for example, can only control electromagnetic phenomena.[3] Despite this, however, researchers have attempted to create espers with multiple powers, such as Dual-Skill and Multi-Skill espers. Aside from the mental performance of calculations, no elaborative and preparatory rituals are required by an esper to produce effects related to their abilities.
Toaru Kagaku no Railgun E01 20m 07s

Misaka Mikoto, Academy City's most famous esper.

Moreover, esper abilities are compartmentalised into two categories: Active and Passive. Active abilities require conscious effort to use, while passive abilities require subconscious effort. Abilities can be classed as both active and passive, such as Accelerator's ability.[4]

Their interference with and subsequent distortion of reality to create effects is based on quantum theory. Their interference is an isolated phenomenon, pertaining only to the observations of the world based upon their Personal Reality. This is in stark contrast with holism, where a large interference with the laws of the whole world is used to make effects.[5]

Power Curriculum ProgramEdit

Main article: Power Curriculum Program

A person enrolled in this program is called an esper and, through a series of drugs usages and experiments, will be cut off from regular reality and enabled the capacity to substitute it with their own.[6] Espers are ranked according to their System Scan results; it is stated that Level 0 espers barely have enough influence to pass the curriculum's grading exams.[7]

Any individual can use the curriculum to acquire powers, such as Misaka Mikoto, who started out as a Level 1 and worked hard during her training to become the 3rd ranked Level 5 esper in Academy City.[8] There are exceptions of course, as with the case of Level 0s. Furthermore, with the Parameter List, it is apparent that esper potential is limited by various factors. This has resulted in researchers determining that it would be wise to focus on developing an esper whose ability is worth more to the city and whose training is predicted to be more resource efficient than that of another person's.

Information regarding the students enrolled in the curriculum, such as their abilities, their level and a brief description of them, is available in the Data Banks of Academy City. Furthermore, certain espers, such as Kamijou Touma, have security protocols in place to ensure that the truth of their abilities is classified. 

According to Uiharu Kazari, the name of an esper ability, such as Electromaster or Telekinesis, is decided by the school that its owner is enrolled in. Only under specific conditions can the name of an esper ability be decided by its owner, such as the Railgun.[9] It is unknown, however, as to what exact conditions an esper must meet to officially name their own esper ability, though its uniqueness may be a factor.

Currently, only Academy City can create espers, although others have tried, such as during the Stargate Project.[10]

Gemstones and speculationEdit

Main article: Gemstone

A Gemstone esper is an individual who can emit AIM without requiring participation in any power development program. Gemstones are the beings that Index likely referred to as having "talent"; the envy of their abilities from their peers is what led to the creation of magic.[2] There are currently 50 confirmed Gemstones in the world.[11]

In extension to this, it has been speculated that there may be people who have not realized that they have powers, or that their certain propensities or idiosyncrasies, as subtle as good looks or good penmanship, may actually have this power.[12]

Many Academy City students are aware of Gemstone rumors, but treat them as urban legends. This is due to many feeling that it is unfair for esper powers to be gained without having gone through the Power Curriculum Program to attain them. Currently, Sogiita Gunha, who is the strongest Gemstone, and Himegami Aisa are the only two known Gemstone's in Academy City. Kamijou Touma, as mentioned by Kumokawa Seria, does not classify as a Gemstone esper as due to his powers being unrelated to AIM; it is believed that Imagine Breaker is beyond the current understanding of Academy City researchers.[11]

List of EspersEdit

Name Ability Name Level Notes
Accelerator Accelerator 5 Second protagonist of Toaru Majutsu no Index. Main character of Toaru Kagaku no Accelerator; Ranked #1 Level 5 Esper; Former operative of GROUP. Can manipulate vectors.
Kakine Teitoku Dark Matter 5 Main character of Toaru Kagaku no Dark Matter; Ranked #2 Level 5 Esper; Former leader of SCHOOL. Can create and control matter that does not exist in this universe.
Kakine Teitoku (Beetle 05) Dark Matter 5 The being that was created when Rhinoceros Beetle 05 usurped control over Kakine Teitoku's being in Shinyaku Toaru Majutsu no Index Light Novel Volume 06.
Misaka Mikoto Railgun 5 Main character of Toaru Kagaku no Railgun; Ranked #3 Level 5 Esper. Can create and control electricity.
Mugino Shizuri Meltdowner 5 Ranked #4 Level 5 Esper; Leader of ITEM. Can shoot a beam of electrons.
Shokuhou Misaki Mental Out 5 Ranked #5 Level 5 Esper. Can manipulate the minds of people.
Aihana Etsu Unknown 5 Ranked #6 Level 5 Esper whose identity is impersonated by many people.
Sogiita Gunha Unknown 5 Ranked #7 Level 5 Esper; Gemstone. Ability is "impossible to define", but capabilities include but are not limited to: moving past the speed of sound, enduring otherwise fatal attacks, creating forcefields, colourful explosions and etc.
Aizono Mio Military Oil 4 Was part of a project called White Alligator. Can manipulate oils breaking down and reconstructing them.
Kinuhata Saiai Offense Armor 4 Operative of ITEM. Can control nitrogen as a means of attack and defense.
Kirifu Megumi Telekinesis 4 Student of Tokiwadai Middle School.
Kongou Mitsuko Aero Hand 4 Can create a propulsion of wind wherever she lays her hands, which displaces objects or creates projectiles.
Kouzaku Mitori Liquid Shadow 4 Kihara Gensei's underling, ex-friend of Dolly. Can control liquids with a specific gravity of 20 or greater.
Kuroyoru Umidori Bomber Lance 4 Member of Freshmen; cyborg. Can create nitrogen lances from her hands.
Kushiro Katabira Synchrotron 4 Ex-user of Level Upper. Ability is hinted to allow the creation of large explosions from certain periodic elements.
Misaka Worst Radio Noise 4 Clone of Misaka Mikoto from the Third Season Project.
Musujime Awaki Move Point 4 Former Operative of GROUP; Once considered a potential Level 5 candidate.[citation needed] Can teleport objects without the need to touch them.
Shirai Kuroko Teleport 4 Second protagonist of Toaru Kagaku no Railgun; Member of Judgment. Can teleport herself and other objects upon touch, as long as the total teleported weight is less than 130.7 kg.
Takitsubo Rikou AIM Stalker 4 Potential Level 5 candidate; Operative of ITEM. Can track down espers, copy their abilities, and manipulate their AIM fields.
Unabara Mitsuki Telekinesis 4 Appearance used by Etzali. Can move objects from afar. Can also turn his own body into a cryogenic state of invulnerability.
Yotsuba Telepathy 4 Member of Judgment. Mentioned by Komoe as a specialist in Mind Hound-related matters.
Hokaze Junko Rampage Dress 4 Main protagonist of Toaru Kagaku no Railgun Gaiden: Astral Buddy; Potential Level 5 candidate; Student of Tokiwadai Middle School. Manipulates electrical signals in her body cells to increase her physical and olfactory capabilities.
Yumiya Iruka Wave Conductor 4 Can freely control waves of light and sound; amplifying and concentrating them.
Awatsuki Maaya Float Dial 3 Student of Tokiwadai Middle School, and part of the swim team. Can manipulate bouyancy of herself and other objects.
Kobayashi Satori Telepathy 3 Student of Tokiwadai Middle School.
Konori Mii Clairvoyance 3 Member of Judgment. Can see through things, which is akin to X-ray vision.
Mitsuari Ayu Mental Stinger 3 Once considered a potential Level 5 candidate. Can manipulate the minds of people, the same as Mental Out.
Naru Perfect Paper 3 Member of Scavenger. Ability involves manipulation of paper.
Okahara Ryouta Pyrokinesis 3 Ex-user of Level Upper (anime only). Can shoot homing flames.
Saraku Unknown 3 Operative of MEMBER. Can teleport directly behind a target. Ability dubbed as "Kill Point" by Accelerator.
Sisters Radio Noise 2-3 Clones of Misaka Mikoto.
Usukinu Yasumi Side Arm/Insulation 3 Appears only in a Drama CD. Ability involves energy barriers.
Wannai Kinuho Hydro Hand 3 Student of Tokiwadai Middle School, and part of the swim team. Can manipulate water.
Haruue Erii Telepathy 2 Displays power beyond her Level class when exposed to certain frequencies.
Hitokawa Hasami Pyrokinesis 2
Jufuku Miho Dummy Check 2 Ex-user of Level Upper. Can make people less aware of her presence.
Kaitabi Hatsuya Synchrotron 2 Ex-user of Level Upper; Perpetrator of the Graviton bombings. Can create explosions by accelerating gravitons found in objects made of aluminum.
Kumokawa Maria Violence Doughnut 2 Ex-student of Kihara Kagun, younger sister of Kumokawa Seria. Can increase the centrifugal force of her attacks by 0.5 to 2 times.
Himegi Matsuri Unknown 1
Sakurazaka Fuuga Malicious Fake 1 Student of Sakugawa Middle School. Can control computers directly without using any peripherals like a keyboard or mouse.
Uiharu Kazari Thermal Hand 1 Member of Judgment. Can keep part of an object's temperature constant.
Akemi Telekinesis 0 Ex-user of Level Upper. Ability involved levitation of objects when under effect of Level Upper.
Fremea Seivelun Agitate Halation 0 Younger sister of Frenda Seivelun.
Hamazura Shiage Unknown 0 Third protagonist of Toaru Majutsu no Index; Former leader of Skill-Out; Member of ITEM.
Hattori Hanzou Unknown 0 Leader of Skill-Out.
Hebitani Tsuguo Unknown 0 Usurping leader of ex-Skill-Out group Big Spider.
Kamijou Touma Imagine Breaker 0 Main protagonist of Toaru Majutsu no Index; Any supernatural power manifestation gets cancelled by a mysterious power in his right hand. Though classified as a Level 0 Esper by Academy City, Touma is not an Esper, nor a Gemstone, as his ability does not utilise AIM principles. Originator of Kamijou Faction.
Komaba Ritoku Unknown 0 Former leader of Skill-Out.
Koujun Kikuhiko Unknown 0 Ex-user of Level Upper.
Kurozuma Wataru Unknown 0 Founder and ex-leader of ex-Skill-Out group Big Spider.
Mako Unknown 0 Ex-user of Level Upper.
Muu Unknown 0 Ex-user of Level Upper. Ability involved levitation of objects when under effect of Level Upper.
Saten Ruiko Aero Hand 0 Ex-user of Level Upper. Ability involved manipulation of wind when under effect of Level Upper.
Tamezou Unknown 0 Former member of ex-Skill-Out group Big Spider.
Trick Trick Art 0 Ex-user of Level Upper. Ability allows him to distort light, which can be used to create illusions.
Tsuchimikado Motoharu Auto-Rebirth 0 Magician and Esper; Former operative of GROUP. Ability heals all injuries (unspecified time period), but can fail at any time.
Yokosuka Unknown 0 Leader of his own Skill-Out band in District 7.
Amime Unknown Unknown Ability involves manipulation of frictional coefficients.
Anzai Telepathy Unknown Ability mentioned to involve telepathy.
Aoki Unknown Unknown Ability involves the manipulation of earth to create crags.
Aogami Pierce Unknown Unknown Student of A Certain High School; one of the Delta Force, alongside Kamijou Touma and Tsuchimikado Motoharu.
Yobou Banka Unknown Unknown Operative of SCHOOL. Can rip vehicles apart and attack with some sort of force. Ability theorized to be Level 4 and a form of telekinesis.
Tazuma Claire Unknown Unknown Gemstone and member of the Kamisato Faction with body cells more like a plant's than an animal's and capable of manipulating plants.
Edasaki Banri Telepathy Unknown Can communicate with other telepaths.
Elder Sister Flux Coat Unknown Ex-user of Level Upper. Ability allows the manipulation of the viscosity of asphalt to the point of reshaping it.
Ellis Warrior Unknown Unknown Participant in failed experiment to create a Magician-Esper hybrid twenty years ago.
Full Tuning Unknown Unknown Clone of Misaka Mikoto.
Fusou Ayame Unknown Unknown Ability involves amplifying her own voice to create explosive shockwaves
Futawa Delay Unknown
Girl in the dress Measure Heart Unknown Former operative of SCHOOL. Can regulate the perceived relationship between two targets; can set herself as a target.
Himegami Aisa Deep Blood Unknown Gemstone. Attracts and kills vampires.
Ichika Stealth Unknown
Junta (Railgun anime) Unknown Unknown Ex-user and dealer of Level Upper. Member of Elder Sister's gang.
Junta (Railgun manga) Unknown Unknown Ex-user and dealer of Level Upper.
Kazakiri Hyouka Counter Stop Unknown An aggregation of AIM diffusion fields of the entire Academy City. Key to the Imaginary Number District.
Komaki Unknown Unknown Student of Tokiwadai Middle School.
Kounoe Haruki Unknown Unknown Avid video gamer and ex-"delinquent".
Leader Predator Unknown Leader of Scavenger.
Matsuoka Raita Ion Trade Unknown Arsonist 'Fire Bug'. Can manipulate microscopic ion exchange.
Mitsumi Thermography Unknown
Miyama Shaei Unknown Unknown 4th-grade student of Matsuume Elementary School. Ability is similar to Precognition and Thoughtography.
Naoya Electromaster Unknown Can create a spark if he concentrates hard enough.
Nunotaba Shinobu Critical Unknown Ability unconfirmed but said to involve touching the target.
Raifu Unknown Unknown Ability involves controlling gravity to redirect attacks away from her.
Sakibasu Yuri Carbon Search Unknown Student of Tokiwadai Middle School.
Seike Stick Slip Unknown Member of Scavenger. Ability involves manipulation of frictional coefficients.
Silvercross Alpha Unknown Unknown Operative of Freshmen; A cyborg who apparently displayed no ESP ability.
Tao Aqua Navigator Unknown Member of Full Course. Ability set the directionality of a specific liquid.
Tetsumou Skill Polygraph Unknown Operative of BLOCK.
Therestina Kihara Lifeline Unknown Unknown Provider of the First Sample of the Crystallized Esper Essence; Former captain of Multi-Active Rescue; Creator of Capacity Down.
Todoroki Unknown Unknown Ability involves manipulation of water particles.
Tsurigane Saryou Unknown Unknown Ability allows her to see and visualize AIM Diffusion Fields.
Unknown Equal Speed Unknown Bank robber. Can maintain inertia of his projectiles continuously.
Yakumaru Mix Master Unknown Member of Scavenger.
Yanagisako Aomi Unknown Unknown Member of Judgment; Roommate of Konori Mii.
Yamashiro Shoubu Stress Dowsing Unknown Can sense a target's malice and hostility.
Yuuri Senya Astral Buddy Unknown Second protagonist of Toaru Kagaku no Railgun Gaiden: Astral Buddy; Can separate her AIM Diffusion Field from her body to become a AIM thought being.
Yuzuriha Ringo Unknown Unknown Survivor of the Dark May Project, which implanted Accelerator's thought patterns within her.

ReferencesEdit

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