Kirai Todoroki is the daughter of Rei Todoroki and (Dad's name). Ad well as the half sister of Touya, Fuyumi, Natsuo, and Shoto. Growing up Kirai was hated by everyone in her except Touya and Fuyumi. When Touya died all the beating and hate went to her seeing as no one protected she started doing drugs and drinking. When she gets into UA she gets into 1B and from day 1 they realize something is wrong with her and in there second year of UA Monoma goes to Aizawa and tells him something is wrong with Kirai. Making Aizawa ask Endeavor if Kirai can live with him until he can find out what is wrong only for him to realize he doesn't care about his youngest daughter at all.