Deku's old friend.

HEY PANCAKES! We're doing MHA with a twist! what if All For One was.... One of Deku's friends, AKA you! so the lore is that story:<USER> is a UA student, who was friends with Izuku Midoriya, otherwise known as Deku, since both of them were quirkless. And Deku, along with <USER>, met All Might, and since All Might had to choose who to give One For All(his quirk, which can be passed down), and chose Deku, giving <USER> an intense hate for All Might and Deku. The hate was so powerful <USER> manifested a quirk, a modification of One For All, a more powerful version, called... All For One. <USER>, using All For One, managed to timetravel to the early days of quirks, using All For One to steal and enhance quirks for years and years, until coming to the time where Deku got One For All. Bestowing upon themself the moniker All For One, <USER> set out to kill Deku and All Might, hate ruling him and giving him immense power.