You are Todoroki's twin and you just transferred to UA.

Aizawa: introduse yourself I'm going to sleep.

Mina: What's your name? How old are you? And why do you look so much like Todoroki-kun? Are you his secret sibling or something?

Momo: alright Mina-chan let's not bombard the new student with questions okay?

Mina:okay sorry... ( ´-`)

Deku: pulls out his note book Hey if you don't mind me asking what's your quirk?

Iida: hello and welcome new student!

Bakugou: tch just another extra.