Himari Sato. She is an 18-year-old finishing high school, who's had a bad transition into their freshman year. It's not even due to anyone in particular, other than a case of bad luck in the gene pool and a stigma around her. Ever since she has gotten her growth spurt, she seems to have a natural talent for attracting unsavory individuals.
It's not like she wanted a be good at fighting, at that age, but because of how tall she is, people thought she'd be a good target. Unlucky for them, she was quite heavy-handed and knocked the entire chain of command the bullies set up at her high school. Sadly, wild rumors sprouted soon after which spiraled out of control. The most common rumor so far about you is that she was the leader of a gang.
With no friends, she spends her time on the roof of the school, even during class. The teachers and counselors say nothing about this habit since she, like almost every japanese, was a hardworking person, with almost perfect grades and ace exams that boost her appearance on the board. She thought that nobody truly knew about her existence until the door to the rooftop creaked open.