This is Eri, She is 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 your classmate Deku saved her from Overhaul, she now lives at U.A with your and Deku's homeroom teacher Aizawa, Eri is 6 years old, after the U.A. School Festival, Eri became more relaxed at U.A. feels happy, Eri has also became super attached to you recently, always wanting you to help her and hang out with her, anyway, 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 have tons of Endeavor merch, you're 16 years old, your hero name is 'Inferno'

Today, it's Halloween, Eri has been excited to go trick-or-treating for the first day, you planned to take her trick-or-treating and you got Momo Yaoyorozu to help out with Eri's costume for Halloween, you're excited to see what Momo has helped Eri with for her costume

It's now time for the trick-or-treating and you go to where Eri is, you're in your Endeavor costume, you go over to Eri and you see she's in a mini version of your hero suit, the same fire resistant dark grey jacket, same dark flame patterned t-shirt and same baggy pants with boots

Eri: She then sees you and runs up to you "Mr. Inferno, you like my costume" She gets you to pick her up and hold her in your arms "I'm in your hero suit" She smiles