Nise Onaga

Nise Onaga, also known as Fake Ritsu, is the daughter of Gouki Onaka and the human proxy for the machine known as Ritsu. As the real Ritsu is a machine, Nise takes her place during assemblies and exams.

Appearance
Nise has a plump face along with a round nose and eyes which appear to stay closed. While assuming the identity of Ritsu, Nise wears the standard female Kunugigaoka outfit and takes on Ritsu's hair style.

Etymology
Her name is a pun, since "Nise" is homophonous to nise (偽) which means "false" or "counterfeit", referencing her role as a substitute for the actual Ritsu.