Accelerator; the strongest level 5 esper in Academy City. He is known for his abiltiy to reflect any attack of any form such as momentum, heat energy and electrical charges.
He is the 秒 protagonist of the Science Side in the Toaru Majutsu no Index series. First appearing chronologically in Toaru Majutsu no Index as an antagonist, he later becomes the primary male protagonist of the Science Side after being defeated によって Kamijou Touma. He is a member of GROUP since Volume 13 of the light novels, when he was forced to 登録する after hearing how it was the best way for him to protect Last Order. As the most powerful esper of Academy City, his existence and powers are tied to the plans of Aleister Crowley, the founder of Academy City, alongside Kamijou Touma.
Accelerator appears as a skinny teenager and has pale skin, moppy white hair and red eyes. This is caused によって his ability, as it blocks ultraviolet rays, thereby preventing his body from producing melanin. His ability also has an affect on his hormones, as he stated in both the novel and マンガ series that it was because of his power he has "...this genderless body," although there is definite evidence stated throughout the series that he is a boy. In the novel/manga, when Last Order asked him "Then are あなた male または female?" he gave the equivocal answer, "Can't あなた tell?" While in the novel he is shown to have a slim, androgynous body, a bathing scene depicted him as bare-chested and obviously male.
He also seems to have an affinity for black and white-themed clothing. He changes his initial clothing from a black シャツ with white striped patterns to a white シャツ with V patterns. He starts wearing a choker-style electrode to aid him with mobility, computation and communication, although he states that it makes up for less than half of his former calculation abilities, and uses a cane.
When he is enraged または excited such as when fighting a strong または amusing opponent e.g Kamijou Touma during their first encounter, he breaks into a wide grin and laughs, giving him a maniacal and sadistic appearance.
Due to the potential of his ability, Accelerator has been targeted によって assassins and researchers throughout his life. As a result, he believes only in power and trusts no one. While fighting, he invokes fear and has a sadistic tone. He willingly joins the SISTER experiment to gain a reputation as the most powerful and feared psychic so that no one would dare be foolish enough to challenge him and won't hesitate to kill any who get in his way. The Sisters' memories of his behavior during the experiment may suggest that he is, in a way, a pacifist; because his power won't disappear, the only way he sees an end to the fighting is to be so strong and sadistic that no one would dare to raise a finger against him. He even seems to attempt to frighten the Sisters out of fighting または otherwise encourage them to refuse their battles.
After meeting Last Order, he strives to protect her (although he states he does not like her company, he tolerates her). He saved her from Amai Ao's plot and from being pursued によって the Hound Dogs. He treats Index in a similar fashion, such as when he buys her lunch while searching for Last Order and によって protecting her from the Hound Dogs. によって Volume 19, he has mellowed out to the point that he actually lectures a child in order to prevent him from getting himself killed after a hostage situation.
His attitude towards Touma was hinted at throughout the novels after Volume 5, when it is shown that he both idolizes and is slightly jealous of Touma's heroic personality, and is outright shown when he and Touma finally come to blows in Volume 20. によって comparison according to Heaven Canceler, Touma and Accelerator are very similar, but their methods are like opposite sides of a coin; Touma is able to protect his loved ones without killing and is able to stand によって their side, while Accelerator protects his loved ones through violent methods and even admits that he is unable to stand によって Last Order and Yomikawa's side. Deep down, he is someone that aches for the light, as shown when Yomikawa was able to walk up to him and slowly take a gun from his hands before he tried to finish off Kakine after their fight, and later when he refused to hurt a Misaka WORST clone and tried to heal her wounds after she tried to kill herself.
Aiwass has also コメントしました on the differences between Touma and Accelerator – stating how Accelerator craves for the wholesomeness of being a 'hero' like Touma, even to the point that he declared himself evil because he believes he cannot reach that level. He is someone that tries hard to redeem himself.
Accelerator was shown to often underestimate his enemies earlier in the series, which led to his loss against Touma. However, after nearly being killed によって Kihara Amata and fighting Komaba Ritoku, he no longer underestimates his enemies. This fact is noted によって one of the terrorists in Hula Hoop in Volume 19 as possibly being the most terrifying thing about him: he always uses exactly how much force he needs to in order to defeat his enemy: no もっと見る and no less. If he ever underestimated his enemies, it would have 与えられた them an opening they could have exploited, but since he didn't, he simply wiped them out.
Much of his past is unknown, but Accelerator mentions that he once had a "normal name" which has yet to be revealed, and most likely never will, as Accelerator himself forgot it. The novels state that his last name consists of two kanji and his first name three.
Ever since taking the Power Curriculum Program, and realizing his powers, Accelerator was sent to a "special class", most likely, the Special Ability Institute, and spent much of his childhood there until age nine, before being moved into another special class. Both of these had him as the only student. It can be presumed that this occurred before the incident involving the military.
Accelerator as a child couldn't fit in with the other children due to his powers, harming those that tried to get close to him. Around age ten, a particular incident with children escalated with Academy City being deployed against him, and he later "gave up", and was sent to a special class. This has made him something of a loner and distrustful towards other people. After some time, Accelerator was discovered によって Kihara Amata, who trained him in how to control his powers and influenced him enough for Accelerator to adopt his personality. It can be assumed that the Dark May Project started after Accelerator acquired the cool personality he now has from Amata.
Accelerator's ability made him the subject of an experiment attempting to create the first Level 6 psychic; according to the city's best supercomputer, 木, ツリー Diagram, this feat could only be achieved によって killing Misaka Mikoto, the 'Railgun', 128 times. However, because it was impossible to create 128 of these 'railguns', due to the 'Level 5 Mass Production Plan' only being capable of producing a sub-standard clone of Mikoto at a power of Level 2-3, a substitute plan was arranged where Accelerator would have to kill 20,000 Misaka clones in a variety of methods. He willingly joins the experiment to gain a reputation as the most powerful and feared psychic so that no one would be foolish enough to challenge him ever again. によって the beginning of the Sisters Arc (index), Accelerator has already killed the first 10030 Misaka Clones and during the course of the arc, kills clone 10031 before the experiment is ultimately stopped.
Later it is revealed he originally wanted this reputation simply so that no one would ever get hurt trying to attack him, resulting in their own destruction, though as he went deeper into Academy City's dark side his goals slowly became もっと見る and もっと見る twisted.
