A Strange Hero By The Name Of Dr. Jekyll And Mr. Hyde

Izuku is a boy who is exited for his quirk. He is told that it is going to take a while to come in and he soon finds that having a quirk come late is worse than no quirk at all. He deals with the pain until he snaps.
Hyde is an adrenalin junky who is clinically insane and loves fighting. He just wants to thrash everyone. He fights to the point where he blacks out.
Dr. Jekyll is in a cell of sorts when Nezu finds him to bring him and his particular talents into UA. He is interested in finding out what the future holds.