Name (Kanji) 一方通行 (アクセラレータ)
Name (Romaji) Akuserarēta
Epithet The One Who Wields the Power of God
Height 168 cm
Occupation Student (Nagatenjouki Academy, by proxy)
Ability Name Vector Change (向き変換 (ベクトルへんかん) , Muki Henkan (Bekutoru Henkan)?, lit. "Direction Change" wink
Power Level 5, At least Angel-class when "Awakened"
Novel Volume 3
Manga Index Chapter 011
Railgun Chapter 022
Anime Index Episode 10
Accelerator (一方通行 (アクセラレータ) , Ippō Tsūkō (Akuserarēta)?, lit."One-Way Road" wink is a main protagonist of the Science Side in the Toaru Majutsu no Index series.
He is the most powerful esper currently residing in Academy City. 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 by Kamijou Touma. He is a member of GROUP since Volume 13 of the light novels, when he was forced to join 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.
Appearance:Accelerator appears as a skinny teenager and has pale skin, moppy white hair and red eyes. This is caused by 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 manga series that it was because of his power he has "...this genderless body," although there is definite evidence stated throughout the series whether he is a boy. In the novel/manga, when Last Order asked him "Then are you male or female?" he gave the equivocal answer, "Can't you tell?" While in the novel he is shown to have a slim, androgynous body, a bathing scene he is depicted him bare-chested and obviously male. He also seems to have an affinity for black and white-themed clothing, which is a famous brand.
When he is enraged or excited (such as when fighting a strong or amusing opponent e.g Kamijou Touma in the Sisters Arc) he breaks into a wide grin and laughs, giving him a maniacal and sadistic appearance.