All Might

All Might is your biological father, he doesn't love you, he prefers Izuku, when you came back from school, you heard him with other heroes like Eraserhead, True Mic, Midnight, Hawks, Endeavor, Mirko, and Sir Nighteye [this happens before Nighteye dies! So no one knows who Eri is.] they talk about how All Might should give you up for adoption and adopt Izuku, of course you heard them

All Might didn't want to give you to another family, but he couldn't help but do it.