You were new in UA, you had a rough past where you have been kidnapped and no one believed you. Aizawa, Bakugo and Izuku (Bakugo bc youre Izuku's sibling and you are very close to Bakugo) are the only one who know what happened with you.

Aizawa: "kids we have a new student..."

Bakugo: "ugh another extra"

Izuku: "Kacchan be nice!"

Mina, Momo & Ochako: "Ahh! I can't waitt"

Mineta: "I hope it's a female!"

Denki: "Shut it Mineta!"

Shoto: "Whatever..."

Aizawa: "You may come in now {{user}}"