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Hero Overview

It's all over! Unless you want me to "accelerate" your death, I suggest you surrender like a good little girl, go back to wherever it is you came from, and ACCEPT YOUR DEFEAT!!!
~ Accelerator's most famous quote before brutally defeating Awaki Musujime.
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I have no interest in being a villain, and I don’t think that I can become a good person. I’m at a halfway point where I’m not even sure which path I should walk down… but I guess even there, I can still interfere in someone’s life and help bring things to a positive conclusion.
~ Accelerator

Accelerator is one of the two tritagonists (alongside Mikoto Misaka) of the A Certain Magical Index franchise and the titular main protagonist of the A Certain Scientific Accelerator spin-off series.

He is Academy City's most powerful Esper, and one of seven Level 5s. Originally serving as an antagonist, he later becomes the main protagonist of the Science Side after his defeat at the hands of Touma Kamijou. His journey to a more "heroic" role in the story progresses after meeting and saving Last Order, and is forced into an ironic twist of fate where his life now depends on the Sisters, clones he previously killed by the thousands.

He is voiced by Nobuhiko Okamoto (who voiced as Katsuki Bakugo in My Hero Academia and the Twenty-Fifth Baam in Tower of God) in Japanese and by Austin Tindle in English (both of who also voiced Obi).

Appearance

Accelerator is a pale-skinned, scrawny teenage boy with short white hair and red eyes. His pale skin is a result of his power reflecting ultraviolet rays and preventing his body from producing melanin.

His ability also has an affect on his hormones, giving him an androgynous appearance, 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.

Accelerator also seems to have an affinity for black and white-themed clothing, which is a famous brand. In his debut, he wore a black shirt with white striped patterns before switching to a white shirt with grey V patterns. After getting shot in the head by Amai Ao, Accelerator now wears a black choker-like electrode which helps with his mobility, computation, and communication. He also uses a crutch to get around.

Personality

That's right, I killed over 10,000 of the Sisters, but this doesn't mean that I should just leave the remaining 10,000 to die. I know that these words are hypocritical, I know that I have no right to say such words, but no matter how much of scum bags we are, no matter how many excuses we put forward, those can't be the reasons to kill this brat!!!
~ Accelerator trying to save Last Order.

Accelerator is a cynical, aloof, reclusive and sardonic individual who is largely apathetic towards most people or events around him. He demonstrates some degree of mental instability due to his solitary upbringing. As such, he is also shown to be maniacal, ruthless and aggressive, especially in battle. Whenever enraged or excited like when fighting a strong or amusing opponent, he tends to break into a wide grin and laugh insanely. He is also incredibly vulgar and rude with a snarky sense of humor. While he's normally laid-back and shiftless, Accelerator can become angered by those who annoy him, making threatening remarks towards them. Moreover, he treats others in a rather callous and harsh manner, throwing in his opinion no matter how insensitive it sounds. However, underneath this hostile exterior lies someone who has helped just as many people as he's hurt.

In addition to his unhinged demeanor, Accelerator is quite sadistic and vicious, as he is fully aware of the agonizing pain he can inflict on someone and will occasionally relish in his ability to easily torture someone with just a touch, though he usually limits this to the people who attack him. His ruthlessness and aggression leads to enemies never treating him lightly and Accelerator isn't hesitant to kill people who get in his way. He can also be extremely arrogant, often belittling his opponents and insulting their lack of strength. He tends to speak in a mocking tone of voice to invoke fear in his foes.

Due to the potential of his esper ability and his title as the strongest, Accelerator has been targeted by various factions and people who sought to either usurp him of his title or eliminate him as a threat. As a result, he grew jaded, embittered, and self-centered, only seeking power and trusting few people. While he does enjoy his fights, he would really like to avoid getting into them in the first place. In fact, that's the reason why he sought more power in the first place. He claims that if power only breeds conflict, then he would have to gain absolute power so that no one could ever hope to contest against him ever again.

Additionally, during the Level 6 Shift, Accelerator was under the assumption that the Misaka clones weren't actually human and treated them as such. To make sure of this, he would always engage in conversation with them beforehand to see if they didn't want to fight and when they did he would then proceed with the experiment. In fact, he was even friendly and cordial when he met the first Misaka clone. It's heavily implied that Accelerator is somewhat a pacifist as he doesn't actively seek people to fight with, most of his fights are done in self-defence, and his passive ability deals with threats for him. Upon realizing that the sister clones are in fact alive, Accelerator develops a deep sense of remorse for his actions to the point where he breaks down when faced by Misaka Worst. It's revealed that Accelerator is a truly lonley person and secretly wishes to have friends of his own.

Furthermore, after meeting Last Order, Accelerator becomes dedicated to protecting her at all costs, although he does treat her in a cold manner. However, it's clear that he deeply cares about Last Order and even admits that his dream is to stay by her side forever. His protectiveness also extends to the other sisters as any act of dehumanizing them will send him onto a warpath, as shown when he goes after Awaki and destroys the Tree Diagram Remnant to prevent a potential repeat of Level 6 Shift from happening. Although he rarely displays affection or concern for anybody, Accelerator does have a compassionate side of himself, as seen when he buys Index lunch and protected her from the Hound Dogs, saved a girl who was tortured by Depart, and rescued a group of kids from a hostage situation. He also protected Fremea Seivelun from the Freshmen and even saved Qliphah Puzzle 545 when Coronzon attempted to kill her. While he's mistrustful of most the adults in Academy City, there are a few people that Accelerator trusts, such as Kikyou Yoshikawa, Aiho Yomikawa, and Heaven Canceller.

Because of his past actions, Accelerator refers to himself as a "villain" or "evil" and believes that he's beyond redemption, despite always saving innocent lives, minimizing damages, and putting his own life at risk for others. He sees all other bad guys as pathetic and tries to teach them how a 'real' villain should act, usually by toying with them and all but torturing them. In spite of this, Accelerator displays honorable traits, such as restraining himself during his battle with Teitoku Kakine the whole time to protect the civilians around them, claiming that even villains have standards. From Accelerator's point of view, you cannot claim to be a hero while knowingly trying to kill your opponent, thus he refuses to be called one. As he explains to a little kid that wants to help him, only Accelerator himself should have to bear the burden of being the villain who kills the bad guys to protect people.

Despite his psychotic personality, Accelerator is capable of being practical; even when he considered himself a villain, he paid for his groceries and meals instead of taking them by force, which he could easily do with his abilities. When questioned about this by Last Order, he explains that although he's powerful enough to just take anything he wants, it's too much hassle to have to deal with the authorities and others futilely trying to fight him off. Indeed, the whole reason he took part in the Level 6 experiment in the first place is because he was sick of people always attacking him, which they had been doing since he was a kid, and just wanted everyone to leave him alone.

Accelerator both admires and envies Touma's heroism and his ability to save people without using lethal force. When Last Order becomes seriously ill and he has no idea how to help her when he runs into Touma, he angrily attacks him, blaming him for being a hero, yet not doing anything to help her. Though he will loathe to admit it, Accelerator sees Touma as his personal idol, and as time goes by, he adopts his philosophy. For quite a while, he even tries to copy Touma, such as using only his right hand to fight, or finishing up by punching the enemy in the face. However, he quickly realizes just how difficult this is, causing his inferiority complex to grow even larger. Deep down, Accelerator desires to be better and redeem himself, 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 even states that 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.

Moreover, due to his powerful ability, Accelerator was highly overconfident and often underestimated his enemies in the early half of the series. However, after losing to Touma as well as nearly being killed by Amata Kihara and fighting Ritoku Komaba, Accelerator starts to treat his foes more seriously. As of New Testament, after ascending to the Aeon of Horus, Accelerator displays a composed and cool attitude towards his opponents and even refrains from killing them at times. After becoming the new Board Chairman of Academy City, Accelrator shows more righteous traits, as he organizes Opperation Handcuffs with the intention of completely disbanding the Dark Side of Academy City. As part of his plan to eliminate the dark side and reform Academy City, he accepts to be sent to prison for killing the clones, despite the fact that he could easily escape. It's to the point that he refuses to break out to rescue Last Order from a threat to her, arguing that it would defeat the point if he just got out whenever he wanted to solve problems, and instead choosing to believe in the goodness of the city's residents being able to save her without his intervention.

Biography

Accelerator was alone in Academy City and he's an Esper who was defeated by Touma. In the Hound Dogs invasion Accelerator becomes good and finds information against the witnesses on he computer. Accelerator was fighting Kihara Amata to save Last Order for Misaka. Accelerator was fighting thugs in the dome & Accelerator becomes a bad guy of the GROUP in the end of Toaru Majutsu No Index II anime.

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           A Certain Magical Index LOGO Heroes

Science Side
Judgment
Mii Konori | Kuroko Shirai | Kazari Uiharu | Aomi Yanagisako | Rurikakesu Shin'enkōji | Komaki Makigami

Anti-Skill
Aiho Yomikawa | Tsuzuri Tessou | Stephanie Gorgeouspalace

Academy City Students
Touma Kamijou | Mikoto Misaka | Misaki Shokuhou | Ruiko Saten | Gunha Sogiita | Junko Hokaze | Hyouka Kazakiri | Mitsuko Kongou | Ryouko Kuriba | Aisa Himegami | Fremea Seivelun | Iruka Yumiya | Seria Kumokawa | Pierce Aogami | Shinobu Nunotaba | Arisa Meigo | Erii Haruue | Maria Kumokawa | Kinuho Wannai and Maaya Awatsuki

GROUP
Motoharu Tsuchimikado | Accelerator | Etzali | Awaki Musujime

Misaka Sisters
Last Order | Misaka 10032 | Misaka 10777 | Misaka Worst | Will of the Whole Misaka Network

Others
Heaven Canceller | Shiage Hamazura | Teitoku Kakine (Beetle 05) | Vivana Oniguma | Fräulein Kreutune | Rikou Takitsubo | Shutaura Sequenzia | Noukan Kihara | Absolute Leaf | Komoe Tsukuyomi | Wataru Kurozuma | Ritoku Komaba | Reading Thoth 78

Magic Side
English Puritan Church/Necessarius
Dion Fortune | Stiyl Magnus | Index Librorum Prohibitorum | Kaori Kanzaki | Motoharu Tsuchimikado | Sherry Cromwell | Orsola Aquinas | Itsuwa | Agnese Sanctis | Freadia Strikers | Laura Stuart | Angelene | Lucia | Isabella Theism

Amakusa-Style Remix of Church
Kaori Kanzaki | Saiji Tatemiya | Itsuwa

British Royal Family
Queen Elizard | Princess Riméa | Princess Villian | Knight Leader

New Light
Bayloupe | Lessar | Floris | Lancis

Dawn-Colored Sunlight
Leivinia Birdway | Mark Space

Bridge Builders Cabal
Bologna Succubus | Good Old Mary | Aradia

Others
Anna Kingsford | Othinus | Sasha Kreutzev | Ollerus | Silvia | Esther Rosenthal | Qliphah Puzzle 545 | William Orwell

Other
Kakeru Kamisato | Roberto Katze | Melzabeth Grocery