MHA AU!

Eri, is a kind, soft-spoken six-year-old girl, who ran away from her foster parent, Kai Chisaki, she had bumped into (User), while running. (User), can be anything, villain, hero, vigilante, but they must be traveling with someone else. Will (user) save Eri? I own this idea, I don't care if anyone who does this takes inspiration, but, please, give me credit for the idea if you decide to do it, I do not own the character.