An esper (能力者 Nōryokusha?, lit. "Ability User") is an individual who uses scientifically based supernatural powers and emits AIM. The term usually refers to those enrolled in the Academy City Power Curriculum Program, who gained their powers artificially, but can also refer to natural espers, also known as Gemstones. It is also used to refer to magicians by those unaware of the magical nature of their abilities, and therefore treat them as esper-related.
In-universe, espers have only existed for a few decades up until this point.
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.
Academy City's espers have existed for over half a century in the world of Toaru, with the first modern esper being a girl nicknamed "the Beginning Child", who was trained by Academy City based on Meiji-era psychic Mifune Chizuko's data. The system used for the Beginning Child would become the foundation for the Power Curriculum Program to create espers.
Espers are described by Index as individuals with "talent"; this likely refers to Gemstones and each cannot use magic without injuring themselves. An esper is created after passing through the Power Curriculum Program, thanks to which the esper now possesses a Personal Reality, their capacity to substitute reality with their own which is the basis of their abilities, with no two people have the exact same one. In contrast to Magic's Idol Theory, their interference with and subsequent distortion of reality to create effects is an isolated phenomenon based on quantum theory, their observations of the world based upon their Personal Reality affecting things on a micro quantum level to cause phenomena on a macro level. An opposite theory would be holism, where a large interference with the laws of the whole world is used to make effects on a smaller scale. Aside from the mental performance of calculations, no elaborative and preparatory rituals are required by an esper to produce effects related to their abilities, unlike in Magic.
Espers can only access one specific power; Misaka Mikoto, for example, can only control electromagnetic phenomena. Despite this, however, researchers have attempted to create espers with multiple powers, such as Dual-Skill and Multi-Skill espers. Moreover, esper abilities are compartmentalized 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. Esper abilities are further grouped into two major categories, Psychokinesis (PK) and Extrasensory Perception (ESP), with PK having a higher precedence in the classification of esper powers than ESP, especially when an esper power sits on both sides of the boundary between ESP and PK.
Another aspect of espers is that every one of them, even Level 0s, subconsciously radiates an AIM Diffusion Field, minutes amount of their power in a way akin to body heat and weak enough that it can be felt by any of the human five senses and is only detectable through machines. Different powers means a different AIM Diffusion Field: a Pyrokinetic for example will emit AIM that will heat up their environment, a Telekinetic will emit pressure, and an Electromaster will emit a weak magnetic field. According to the Professor, AIM is not simply weak energy emanating from espers, but the unconscious interference against reality, and analyzing its composition and strength gives more insight into the Personal Reality of a given esper than a psychological profile. There does seem to be some direct connection between the AIM Diffusion Field and Personal Reality, if Takitsubo Rikou being able to affect the latter through the former is any indication.
Esper powers are controlled using complex calculations done mentally, so strongest espers are also Academy City's greatest honor students. Because esper abilities rely on mental calculations and concentration, if anything affects the esper mentally, be it pain, exhaustion, surprise, or confusion, they will not be able to perform the calculations needed and their powers won't work. The AIM Jammer takes advantage of this, essentially disturbing espers' concentration.
While the brain is an important component to esper power, it is not the only factor. The entire physical human body is also part of this system and controls the power, though the exact mechanism is not well understood. Produce tested and researched to find out where exactly in the body esper power resides, removing limbs, organs, and brain parts from subjects, but the power still remained, although its output decreased as the body grew smaller, leading the researchers to conclude esper power can only reside in a body containing something that could be called a soul. Likewise, it is shown that, as long as something is considered a part of the body by the esper, esper abilities can be used with it, no matter if that part is attached or detached, artificial or natural. Kuroyoru Umidori can use Bomber Lance through her detached cyborg arms, which she considers parts of her body; Kakine Teitoku can control his Dark Matter even if it's not directly touching his body by no longer distinguishing between his actual body and the parts fabricated from his power; and Rensa operates by changing her biological structure to that of other espers so she can use their abilities. Coffins also operate on this principle, tricking the brains of dead espers into thinking bigger mechanical bodies are their own, which in return make the power stronger.
Genetics also have some influence on esper powers, and DNA can be used to determine esper powers. The very existence of the Parameter List and its ability to predict the future development of an esper before even passing through the Power Curriculum Program might be due to this fact, especially as they used it to get the DNA map of a future Level 5 for cloning ahead of time. Another manifestation of this is how siblings tend to get the same or similar powers: the Tobio twins have the exact same power, the Yumiya sisters have the same power but at different Levels, and Acid and Counselor both have oxygen-related powers. And, while they are not true siblings, there are no clones, or Sisters, of Misaka Mikoto with non-electrical powers. This is not an absolute rule: for example, the Gokusai sisters, or at least Kaibi and Amazora, have completely different powers. The triplets Ichika, Futaba, and Mitsumi likewise each have a different power. It may be that the possibility of similar and identical powers is weaker for ordinary siblings and fraternal twins than it is for identical twins and clones, who share the exact same genetic makeup.
Academy City's curriculum begins at 5-years-old at the earliest, and hormones generated during puberty and adolescence are considered critical to esper development. This might explain the prevalence of espers of kid and teenage age. In fact, it seems that is impossible to become an esper if one is an adult, to the point that the existence of adult espers is seen as improbable. So far no adult esper have been shown to exist, aside from those who used various means to artificially get esper powers, like Kiyama Harumi with Level Upper, Kihara Gensei with Exterior, Houjou Seigo with Ideal, and Kihara Byouri with her Equ.DarkMatter implants.
Ultimately, espers are considered only a byproduct of the Power Curriculum Program on the way to reach SYSTEM, with the reasons and mechanisms behind their existence being the actual objective of the city's scientists. Aleister compares espers to litmus papers changing colors in solutions of different acidities: the interest is in why they changed colors and if it can be manipulated, not the colors themselves. Essentially, espers are a means to an end, not the end itself.
Power Curriculum Program
- 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. Espers are ranked according to their System Scan results, which evaluates six attributes to determine the rank of an esper: Precognition, Clairvoyance, Psychometry, Telepathy, Psychokinesis, and an unknown sixth one. It is stated that Level 0 espers barely have enough influence to pass the curriculum's grading exams.
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. 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. Railgun's editor Ogino Kentarou further elaborated later that there are three types of names for abilities: public ones, the ones that the esper themselves applied for and registered, and self-declared names. 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.
Gemstones and speculation
- 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. There are currently 50 confirmed Gemstones in the world.
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.
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.
List of Espers
|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; Formerly ranked #2 Level 5 Esper; Former leader of SCHOOL. Can create and control matter that does not exist in the universe.|
|Kakine Teitoku (Beetle 05)||Dark Matter||5||Currently ranked #2 Level 5 Esper; 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.|
|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.|
|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||Formerly Kihara Gensei's underling, 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.|
|'Maidono Hoshimi'||Telekinesis||4||Ability has been optimized to produce Level 5-class destructive output. Can grab and move inanimate objects with a maximum weight of 100,000 tons using her index fingers to aim.|
|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. Can teleport objects without the need to touch them.|
|Resanerié Sadis Dialine||Crimson Manager||4||Student of Tokiwadai Middle School and Empress of the Dialine Empire. Can induce and telekinetically manipulate rust.|
|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.|
|Wanigawa Raifu||Gravity Sling||4||Ability involves controlling gravity to redirect attacks away from her.|
|Yobou Banka||Psychokinesis||4||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.|
|Yotsuba||Telepathy||4||Member of Judgment. Mentioned by Komoe as a specialist in Mind Hound-related matters.|
|Yugure Tsumebakei||Macro Dying||4||Can enlarge and manipulate the components of her blood.|
|Yumiya Iruka||Wave Conductor||4||Can freely control waves of light and sound; amplifying and concentrating them.|
|Asakura Olivia Moa||Keratin Control||3||Student of Tokiwadai Middle School. A member of the Mikagami Clique, one year before the main story.|
|Awatsuki Maaya||Float Dial||3||Student of Tokiwadai Middle School, and part of the swim team. Can manipulate buoyancy of herself and other objects.|
|Dolly||Radio Noise||3||A clone of Misaka Mikoto and a prototype for the Sisters for their mass production.|
|Enjou Kasumi||Ribbon Control||3||Student of Tokiwadai Middle School. A member of the Hasekura Clique, one year before the main story.|
|Iizumi Rita||Predator||3||Leader of Scavenger.|
|Kadosaka Rina||Unknown||3||Student of Tokiwadai Middle School. A member of the Mikagami Clique, one year before the main story.|
|Kobayashi Satori||Telepathy||3||Student of Tokiwadai Middle School. A member of the Shokuhou Clique.|
|Konori Mii||Clairvoyance||3||Member of Judgment. Can see through things, which is akin to X-ray vision.|
|Last Order||Radio Noise||3|
|Mitsuari Ayu||Mental Stinger||3||Once considered a potential Level 5 candidate. Can manipulate the minds of people, the same as Mental Out.|
|Okahara Ryouta||Pyrokinesis||3||Ex-user of Level Upper (anime only). Can shoot homing flames.|
|Renka Ephilty||Fly Racing||3||Can manipulate hard plastics to form large gliding wings.|
|Sakuragi Naruha||Perfect Paper||3||Member of Scavenger. Ability involves manipulation of paper.|
|Saraku||Unknown||3||Operative of MEMBER. Can teleport directly behind a target. Ability dubbed as "Kill Point" by Accelerator.|
|Sukezawa Sena||Unknown||3||Student of Tokiwadai Middle School. A member of the Mikagami Clique, one year before the main story.|
|Tsurigane Saryou||AIM Watcher||3||Ability allows her to see and visualize AIM Diffusion Fields.|
|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.|
|Yasutoba Suika||Unknown||3||Student of Tokiwadai Middle School. A member of the Hasekura Clique, one year before the main story.|
|Yonaki Reika||Shape Memory A||3||Student of Tokiwadai Middle School.|
|Yugure Kanaria||Micro Dying||3||Student of Tokiwadai Middle School. Can selectively kill microbes she touches.|
|Haruue Erii||Telepathy||2||Displays power beyond her Level class when exposed to certain frequencies.|
|Houjou Arei||Whisper Bell||2||Technical Exchange Student of Tokiwadai Middle School. It allows her to hear people's emotions as sound.|
|Juufuku 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.|
|Keshouin Asuka||Pyrokinesis||2||Student of A Certain Middle-High School.|
|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.|
|Togawa Asami||Hydro Hand||2||Student of Suzuyama High School|
|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.|
|Frenda Seivelun||Unknown||0||Operative of ITEM; an explosive specialist. Older sister of Fremea Seivelun.|
|Hamazura Shiage||Unknown||0||Third protagonist of Toaru Majutsu no Index; Former leader of Skill-Out; Member of ITEM.|
|Hanatsuyu Kaai||Unknown||0||Known as Decomposer. The twin sister of Hanatsuyu Youen.|
|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 and underwent Power Curriculum Program, his ability does not utilize AIM principles. Touma is not a Gemstone. Originator of Kamijou Faction.|
|Komaba Ritoku||Unknown||0||Former leader of Skill-Out.|
|Koujun Kikuhiko||Unknown||0||Ex-user of Level Upper.|
|Kukimoto Hibiki||Micro Structure||0|
|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.|
|Ryuugou Tomoka||Unknown||0||Participant of Dark May Project.|
|Saten Ruiko||Aero Hand||0||Ex-user of Level Upper. Ability involved manipulation of wind when under effect of Level Upper.|
|Shundan Kimi||Unknown||0||Ability involves the creation of a black hole, somewhere in the universe.|
|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.|
|Yumiya Rakko||Unknown||0||Operative of SCHOOL. Student of Private Shidarezakura Academy.|
|Sisters||Radio Noise||2-3||Clones of Misaka Mikoto.|
|Amahebi Saeka||Scorpion Tail||Unknown||Can infuse an image from her mind into her blood and transmit it into the minds of those who touch it to recreate the effects of poisons.|
|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.|
|Beginning Child||Unknown||Unknown||The first modern esper; Potential Level 5 candidate; Ability involves manipulation of the planetary environment and large-scale climate to produce a localized form of terraforming.|
|Chef||Material Insect||Unknown||Member of Full Course. Ability allowing to command metal wire from the fingertip.|
|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|
|Futaba||Delay||Unknown||Delays the sound waves within a range of 2 meters around her.|
|Unknown||Unknown||Youngest of the Gokusai sisters, a trio of siblings working as contracted assassins. Her ability consist in creating an invisible "tripod", possibly using Telekinesis, to send an object's weight to the ground and allow her to easily lift anything heavy.|
|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.|
|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.|
|Kidera Minori||Aero Separator||Unknown||Part of a group which attempts to steal Accelerator's genetic information.|
|Kounoe Haruki||Unknown||Unknown||Avid video gamer and ex-"delinquent".|
|Makigami Komaki||Unknown||Unknown||Student of Tokiwadai Middle School.|
|Matsuoka Raita||Ion Trade||Unknown||Arsonist 'Fire Bug'. Can manipulate microscopic ion exchange.|
|Mikagami Nagisa||Oil Direction||Unknown||Student of Tokiwadai Middle School (1 year ago)|
|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.|
|Sakibasu Yuri||Carbon Search||Unknown||Student of Tokiwadai Middle School.|
|Sanki Ai||Plus Equipment||Unknown||Can form a potent skintight bandage of fine fabric and telekinesis to aid hemostasis.|
|Seike Taroumaru||Stick Slip||Unknown||Member of Scavenger. Ability involves manipulation of frictional coefficients.|
|Shitatsuzumi Yoshiko||Material Flare||Unknown||Can accelerate the production of flammable gas to cause explosions and shockwaves.|
|Shundan Kimi||Unknown||Unknown||Potential Level 5 candidate; Ability involves the creation of a black hole, somewhere in the universe. Theorized to be a Holistic Esper.|
|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.|
|Tougyo Kea||Sense Striker||Unknown||Can create "physical" illusions to cause targets to reject their regular senses.|
|Unknown||Equal Speed||Unknown||Bank robber. Can maintain inertia of his projectiles continuously.|
|Yakumaru Itsuki||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||Telekinesis||Unknown||Survivor of the Dark May Project, which implanted Accelerator's thought patterns within her.|