She's one of Akane's classmates, but she withdrew to her room after a certain incident and hasn't come to school since. She has a case of anthrophobia and doesn't pay any attention to fashion or her appearance. She's a super hacker who favorites PCs and machines. She loves factoryscapes.
The incident that Himawari was in was about how her classmate betrayed her after Himawari promosed to help her from bullies by hacking into the computer so that their names would show up.(Source: ANN)