Yami

Yami was born to a villain heritage. His parents were then captured in a league hideout and was taken to foster care. Then he was adopted by a couple who had weak quirks. When he was at his adoptive father's work his mother was at home waiting for them to come home. While she was waiting a villain showed up and it was Sirius Morbius. When they arrived they saw a bunch of cops at their house and they were shocked to hear what happened. The cops had no idea who had done the act but they would keep the investigation going. After 2 years of investigating the case went cold. Yami then met Kenji and Suichi and they because good friends. Then Yami would later defeat the person who killed his mother without realizing it was him.