All For One is one of the most important characters in Kohei Horikoshi's My Hero Academia and an incredibly powerful villain. Known to be the overarching villain of the entire story, All For One has been created as the greatest of all the threats that the Hero Society has faced so far. Having been alive for quite a long time, he's run the villains from behind the shadows and has made use of several pawns over the years.
All For One appeared as the biggest thorn in All Might's side long before the current timeline in the story and is the person responsible for his ultimate fall. The two also faced off against each other later on in the story and, as expected, All Might was able to triumph over All For One. Despite that, however, the threat of All For One is far from over and with a master plan of his own, he's looking to surprise the fans once and show the Hero Society what true terror is.
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All For One was one of the two Shigaraki brothers who lived before the time of Quirks. Both All For One and his younger brother were known to be avid readers of the Captain Hero Comics but while the younger brother was a fan of the Heroes, All For One found them always being the victors to be clichéd and dreamt to establish a society where he'd be the Demon King and villains would triumph over the Heroes. Thankfully for him, the era of Quirks arose and All For One was given an incredibly overpowered ability which he named after himself – All For One. This ability allowed him to steal Quirks, stockpile them to make himself stronger, and even distribute them among people. With an ability as strong as All For One he became unstoppable and gathered a tremendous
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