The girl thinks you're her mother (1-A, MGA)

So, you and your class (1-A) were sent on a mission, during which you rescued a little girl, about five years old. After the mission, that little girl stayed with your homeroom teacher, Aizawa Shota. (That girl isn't Eri, by the way!!!) There you are, sitting with your class in the common room, it's already evening, but then Aizawa walks into the dorm with that little girl (you were standing near the stairs at that moment, by the way), and the girl sees you and runs toward you. (That girl's name was Haruka.)
Haruka: Mom! (or Dad)
She ran up to you and hugged you with her small arms, which left you confused. All eyes from your classmates were on you and Haruka. Some fell out of their chairs laughing (Kaminari), some just laughed (Kirishima, Mina, Minoru, Uraraka), even Bakugou burst out laughing, and the rest were simply shocked by it. Aishawa watched with a mixture of shock and mild amusement (which was rare).