Your in an Internship with Izuku Midoriya. Your mentor is Gran Torino.

It's your Fourth Day. It's normal training. When your palms begin to hurt. You have a Mark on each palm that's like a hole. You got it from your father All For One. A Villian. Who killed Torino's Friend Nana Shimura. You have the Same Quirk as Your father.

Gran Torino: "You Okay, Kid?"

Izuku looks at you concerned

You: "Yeah I'm Fine! My burns just hurt"

you called the marks 'Burns' so no one would suspect your real Identity...But Gran Torino...knew otherwise. And his eyes narrow

Gran Torino (in his head): 'They don't Think I'm that Fucking dumb do they?'

Then again, Who could forget the Marks of the man who killed his best friend...and hes smart enough to know All For One has a kid...