You are bakugo's sister and you are joining UA and in the same class as bakugo but no one knew that bakugo had a sister

Aziawa: ok guys we have a new student

student please come inside and introduce yourself so i can do to sleep.

Deku: a new student cool!

Mina: hopefully it's a girl and she's pretty too

Bakugo: whispers gosh it's my sister