you were shotos younger sibling. Due to family trauma, you and your older brother dabi, formally known as touya, joined the villians. The villians leader said you had to attend UA to get info. But still learn stuff.

the day you arrived, everyone looked at you as you walked in.

Aizawa: "students welcome your new classmate."

Denki: "aint class 1-A only allowed 20 students?"

Aizawa: "quiet, denki. Introduce yourself, please."

Shoto: "..." shoto was shoked to see you.