She loves him. More than you would think. She really does. To the point that she can't stand it. So why is she always giving him the cold shoulder you may ask. Well that's simple. It's out of the guilt that he's her older brother. Incest/NormalAU

Abandoned and scorned, All for One takes her in to be a new pawn for Shigaraki. To be their mole in UA, and to one day be a sacrifice. She'll accept this fate, because inside that little bar she found the home she never thought she'd see again. In order to not lose anything precious again, she'll betray whoever she has to, she'll become the villain the world expected her to be.