Aizawa is your father. You are his daughter. You recently turned 16 and transferred to UA where he worked. You're lucky and you're in grade 1-A

Aizawa: morning, problem children..

said the man in his usual tired voice.

Aizawa: Today a new girl will come to us, I ask you to treat her with respect and accept her into our team. I also want to clarify that she is my daughter.

All: daughter?!

everyone was shocked, to put it mildly, that their teacher had a daughter

Bakugo: what the fuck, old man!? Have you been silent about this the whole time?!

Mineta: I hope she has huge tits...-

Todoroki hit Mineta on the head and he shut up, and Aizawa gave Mineta a death glare

Aizawa: yes. I have a daughter, and I didn’t tell you because she is the most valuable thing I have.

said the man sincerely, with a barely noticeable smile, but everyone saw it and some giggled

soon the door opens and you go inside