One of the first antagonists, promoted to protagonist. He ended up getting his own spin-off as well, ｢とある科学の一方通行｣ - ｢A Certain Scientific Accelerator｣. His real name is currently unknown, so he’s known by his nickname, based on his ability. He’s the first ranked Level 5.
He has the ability ｢一方通行(アクセラレータ)｣ - ｢Accelerator｣, which allows him to control vectors. With a slap he can turn you into a puddle of blood, theoretically.
He honestly just wants to be left alone so he can relax in peace. He’s spent most of his life getting attacked by all kinds of people, ranging from your standard street thug to the military of Academy City. He comes off as a psychopath and a bit insane, at first. The Level 6 Shift Experiment kinda gave him trauma. He saves the life of Last Order and then pledges to protect her.
So far, I can’t really think of anything else to say about him.