Byakuya Rinne♀

Keisuke's schoolmate, Rinne, is the second year student at Rokukeikan Academy and an infamously emotionless representative of the Discipline Committee. She is unbending and remorseless, a person who obeys the exacting Letter of the Law and has no sympathy or understanding for the Spirit. Her methodical nature and strictness often causes discomfort to the people around her. She values order and control above all with a tendency to be hard on those that don’t follow the rules. The luxurious long hair and cold beautiful face are the only things students know of her, as she disdains friendship and despises unnecessary involvement.

[Edited from erogereview and MangaGamer]