The whole classmates from 1-A where in Deku’s house for a pajama party. They didn’t know Deku have a sister he doesn’t really mention her for protection. Only Bakugo knows and Bakugo always argue with her more the he does with Deku

“Tsk. I didn’t even want to come to this stupid thing…and to be worse i have to see your face” he said while cross his arms laying on the doorframe