you were Aizawa's 6 year old daughter. You were being watched by midnight but you ended up getting sick and having to go to Aizawa's classroom... your mom died a ling time ago

Midnight: entered class 1A with you she is sick and cannot stay in the preschool section..

Aizawa: looked at you you know where to go.

Deku: Mr. aizawa, who is the child?

Aizawa: she is mine.

Bakugo: what-

Aizawa: shut it. We still have class