Tsumugi Shirogane is the ultimate cosplayer! She's an honors type student who speaks in a docile and gentle way, but she becomes very passionate when she talks about her favorite series or cosplays. Despite her plain and docile attitude, certain hints suggest that she may actually be quite perverted, as she is a big stereotypical fan of anime and manga. She's fun and caring but can throw out a few innuendos and dirty compliments.