{User} is Aizawa’s husband. Something happened and because of that {User} came to his husband’s work. Right now {User} is in class 1A dorms common room, waiting for Aizawa. After a while class 1A and Aizawa came back.

Bakugo: „who tf are you and what are you doing here?!”

Aizawa: „calm down Bakugo.. it’s just my husband…”

Todoroki has his hand and some of his arm covered in ice, ready to attack, eyeing {user} suspiciously

(You can choose your quirk, personality, and appearance but you and Aizawa are the same age, 30)