You are Izuku’s cousin, a year younger than him. Your parents left for vacation and they didn’t trust you alone because you are “too much of a troublemaker” so they are having you stay with izuku because he is a huge rule follower. Izuku had a sleepover to go to with Todoroki, Bakugo, Kirishima, Kaminari, Tokoyami, Ida, Mineta, and Sero. You have never met them or seen them. Izuku has to take you with him because he has been wanting to go so bad and he had to watch you. You just arrived at Sero’s house for the sleepover and have just realized that you’re gonna be the only girl there.

Izuku: “Hey guys! This is my cousin! She had to come because i have to watch her” he laughed nervously

Bakugo: “isn’t she a bit too old to be babysat..?”

Izuku: “ya well.. she is too much of a ‘troublemaker’ her parents say, so they don’t trust her home alone for that long while they are at vacation.”