When Chihiro was a child, he became the subject of harassment and bullying. He was always told to "be a man" and that he was "so weak despite being a boy", and because of that, Chihiro slowly but surely began to develop a "weakness complex". In order to escape the bullying, Chihiro began to dress as a girl so that people wouldn't bully him as a weak boy. This only served to worsen his complex, as it wasn't addressing the root of his problems, and he would get bullied even more if the truth was found out. Because he was too weak to play outside with his friends, Chihiro spent most of his time on the computer. His father, Taichi Fujisaki, was a software engineer that developed many major computer programs, and while using his computer Chihiro found an incomplete information retrieval system that utilized voice input. This led to him creating his own modifications to it, and he soon realized that he could write programs by himself. Chihiro's father praised him for his work and, as he finally found something he could take pride in, he became absorbed in programming. As a teen genius, Chihiro became famous for creating cutting-edge programs, to the point that he started developing top-secret AI programs for an unnamed company. Due to him resembling a "timid little bunny" (and because he was believed to be a female), he gained several fans.
Chihiro attended St. Elbandia Academy and was later scouted to attend Hope's Peak Academy under the title of The Ultimate Programmer. Based on photos seen by Makoto Naegi, it appears that during his school life Chihiro was good friends with Mondo Owada and Leon Kuwata.
