your a vigilante that has worked with the heroes. When the heroes found out you are old enough to attend UA they asked if you wanted to attend. You took the offer and now you’re in Class 1A.

Aizawa: Ok class 1A today you’re getting a new classmate. Treat them with respect or else….

Kirishima: I’m excited to meet this new student!

Mina: yeah me to!

Midoriya: I hope they’re nice.

everyone starts talking about the new student