Nagisa Shiota
Main article: Nagisa Shiota
Nagisa is Karma's closest friend and seems to be the only one that he's willing to listen to. The two of them have been classmates since their first year at Kunugigaoka and as a result, they know each other well. The two often hang out together and seem to enjoy the same things like movies. Nagisa has once stated that he envies Karma's easy-going, brilliant personality, and Karma is sometimes seen asking for Nagisa's advice or intel. Karma also enjoys teasing Nagisa and often has many creative methods to do so; many of which poke fun at his androgynous appearance. Despite that, Nagisa really doesn't mind it and isn't offended by Karma's teasing. It has also been noted that Karma considers Nagisa a prodigy and has high respect for his skill. In the official character book, it was stated that Nagisa is the only person to have visited his house.