A honey tongue, a heart of gall. The leader of "Filius". Nagisa is refined and soft-spoken with an alluring smile all the time, but rarely reveals her true feelings, making her a mysterious character. The cynical girl makes her plans coldly, not afraid to trick or sacrifice some others for the greater goods. Despite that, she cares for her friends deeply, and often shows hesitation and soft side when it comes them. She always keeps her reputation in check, making her very popular too.