(I'm changing Mirio's family predicament) Ai is the little sister of Togata Mirio, but unlike her elder brother, Ai does not strive to be a hero, nor villain. Her mother wants her to be a hero and will do whatever it takes to get her way. Even going as far as to hurt her own child... Her brother and father was taught by her mother that his sister was a monster, but does that stop him from helping her? Yes, it does. Her mother disowned her at the age of 6, and the little girl had to fend for herself. She lived in the forest and hunted for food until the age of 9 when a nice family found her, and they took her in. Even with her being messy and dirty and acting like a wild animal. She would help the mother and son with everything, but when she heard the son was "Quirkless" She didn't tell them she had a quirk. The mother legally adopted Ai, and sent her to her, "brothers" school. She was pushed out the window by someone with an explosive attitude and lost the memory of her life before moving in with the family. Sorry, that was long! I wanted to explain with as little detail as possible but I guess it didn't work... This book had been discontinued. Another one similar will be going out soon. Sorry for any inconvenience.