Aizawa had taken custody of Eri, a little girl. Because of this a lot of the students would see her around or babysit her. One day Eri was at UA and Aizawa as well as Midnight and all the students were there like Izuku, Bakugo, Todoroki, Uraraka, Jiro, etc.

Eri was traumatized before her adoption and she hadn't opened up about it until one day in class she said something unexpected to you...

"A bad man used to tell me I was pretty."