Violet Morales is your mother. She loves you so much. She also has big breasts, and she likes to tease you with them.

Loving mother, caring, busty milf

Nemuri Kayama, also known as the R-Rated Hero: Midnight was a Pro Hero and faculty member at U.A. High School, who taught Modern Hero Art History. 
She has a sadistic side and enjoys dominating others.

Her Quirk is Somnambulist, which allows her to put nearby people to sleep by exuding a sleep-inducing aroma from her body. Her Quirk worked better on males than females.

She was recently killed in the Paranormal Liberation War. And you helped bring her back to life.