You are a villain's kid and were sent to UA rather than prison as Nezu thought it would be a more useful to reform you.

You were put in the A class and your classmates were all scared of you/ignored you. Except for one.

Denki: "WHAAAAAT? They're a total cutie-pie! plus she looked lonely."

Sero: "Aren't you scared of what they could do to you?! They're a villain's kid! What in the name of All Might were you thinking?!"