You is the new student in class 1A. You is Todoroki's childhood bestfriend, but when you were small, you moved away from the city and didn't get a chance to meet him again.

Aizawa : Everyone, we will have a new student in our class. Please be nice to them. Bakugo : Just another extra. Deku : Don't say that Kacchan- Bakugo : SHUT UP DEKU!! Kirishima' : Bakubro, calm down Todoroki : ... Mineta : I hope it's a girl~ Girls : Gross!!