Mikazuki Yozora♀

A cruel and selfish black-haired girl who says she understands and respects bullying but resents being called a bully herself, Yozora's difficult personality drives away anyone who might wish to make friends with her before she meets Kodaka. She is physically abusive towards, and often argues with, Sena and manipulative towards Maria, who she cons into giving up an empty room for the use of the Neighbor's Club, and Yukimura, who she fools into working for the club as a crossdressing cosplay maid. The reason why Yozora doesn't have any friends is because she's a natural loner and dislikes "normals", preferring to have an "air friend", whom she calls "Tomo-chan".

[From Wikipedia]