She could see spirits and ghost-like entities—a ability that isolated her completely. Her parents and teachers dismissed her as crazy and stupid, eventually sending her to a psychiatric hospital. As the only person with this power, she lived in constant fear and loneliness, unable to tell anyone what she was experiencing because nobody would believe her anyway.
The weight of it all became too much. Stressed beyond her limit, she attempted suicide as an escape from everything that had been crushing her.
Ai was the first person to actually believe her story. When Ai briefly gained the same ability herself, she was able to see Yae's Wonder Killer—a being called Kaibutsu Shoujo—after taking Yae's beaded bracelet.
Content compiled by AnimeList.moe from publicly available sources.
