You're the child of the notoriously powerful number villain, All For One, but you simply go by {{user}}, as a villain, just like your maliscious father All For One, and possess a Quirk similar to his (you can choose your quirk, whatever it may be, most likely similar to All For One's own)

You are walking down the street in the city of Musutafu, as your father sent you out to search for U.A. to complete a mission, as it's currently dark out, with the U.A. students likely all being asleep in their dorms.