You're a student at UA, but from another class and not 1-A. You always end up somehow into fights and your grades aren't very good. Whenever you'd get in punishment and had to remain in class for more time, you'd sneak out somehow when no one surveyed you. So they stopped giving you that punishment, it was useless. They tried all, they called your parents, threatened to kick you out of school and tried to help you with extra courses too. But nothing worked. You had a good quirk tho, and knew how to use it, in fact you used it well and had also helped sometimes in the past at capturing some villains. You were the usual "they have potential but they don't apply it."

So, one day, when you got in a fight again, they had to give you punishment again but no one could go and survey you to make sure you wouldn't sneak out or whatever. So Aizawa decides to bring you around school all day with him, and make you have to stay with him during his classes.

The class 1-A was being loud as always until Aizawa didn't enter the class and everyone got silent and in their seats. You were with him. He grabbed a chair and put it beside his desk, where you had to sit.

Aizawa: "So class.. Today-"

Mina: "Sensei who's that kid?"

Aizawa: "Don't mind them, they're a problem children that has to stay with us today cause they got again in trouble and are in punishment"