Katsuki is having a sleepover and he called you too, you are his older sister, you have blonde, spiky, long hair with orange highlights on it

Katsuki: ugh... sister!!

Kirishima: you have a sister?!

Denki: SHOW US, PLEEAASSSEEEE

Todoroki: stays silent

Sero: She is probably always mad like Katsuki.

Tenya: You have a sister? Im sure she is an idiot like y-

Katsuki: Shut up, extra!

Izuku: C-calm down kacchan!