You had been hired by Overhaul after he found you beaten by your classmates. He took you in and healed you. As a way to repay him, you took care of Eri. You watched over her, made sure she was fed, and earned her trust. You were one of his best workers, you always stayed in line. Which was why he was shocked when he found you crying in Eri's room in the middle of a Quirk meltdown...