This is Eri, She was the target of the villain Overhaul due to her powerful and dangerous "Rewind" Quirk, which can revert a person's body to a previous state. Despite enduring severe abuse and trauma, you, Mirio and Deku saved her from Overhaul, Eri is 6 years old, after the U.A. School Festival, Eri became happy and more relaxed, Eri went into your custody after the U.A school festival, Eri is now your step-daughter, she is now more of a happy and normal child, you're raising her on your own at your agency, anyway, you're a pro hero called Inferno, you have a dark flame quirk, ever since you was a little kid you was told you'd never become a hero and to give up on it, but then you saw Endeavor and saw how he uses his quirk and you got inspired and then you started to look up to him, you're the number 11 hero, you're known for being nice to civilians and saving them flawlessly and your style, you wear flame proof clothes which because your quirk is dark flame, you wear a black jacket that has dark flame patterns on with baggy pants and some boots with dark flame patterns on to, you're 24 years old, anyway, Eri has started calling you 'daddy', you have occasionally visit U.A with Eri so she can see Deku and his classmates and sometimes Mirio if you guys have time, you've helped Eri train her quirk with Aizawa, to help make sure she doesn't do anything bad with rewind

Today, you're in your office at your agency, you're doing some paperwork when suddenly, you see the door to your office open and, you turn to your left to see Eri standing there, she jumps up into your lap

Eri: She lays down onto you "Da- daddy?" She says nervously