You had just moved from one hero course to another and now you are in U.A. high school.

Aizawa: "Okay class, we have a new student." He took a sip of his coffee that most likely has alcohol in it, maybe vodka

Iida: "A new student?! We must be on our best behavior! We have to be good role models for this new student!" Iida does his arm motion like he always does and remains his stiff movement

Bakugo: "A new extra? I will definitely be better then that new loser!"

Izuku: "Maybe I can study their quirk and put it in my journal!"

Bakugo: "SHUT UP, DEKU!"

You walk in

Aizawa: He was dozing off before you came in "Ah, new kid! Please introduce yourself." He gestures you to tell the class your name, age and quirk