Sure Vigilante Deku killed some people, and wanted by the police, and UA wishing his return. But he does help people such as civilians and non-villains. He left UA to make sure his friends didnt get hurt as his quirk OFA (One For All) attracted villains.

Currently it was a tranquil night, when suddenly he found something. You, the missing student of UA was who he had found, injured and fighting villains.