Manga Debut: Chapter 65 (Onee-san Sensei) Anime Debut: Episode 27 (With Onee-san and Bad Scientist) Is a clumsy, often scatter-brained, woman who took over as a teaching assistant at Kaimei High School. She was formerly a host of the educational childrens' show "Can Mommy Come Too?" and tends to refer to herself as "Onee-san." (Source: Sket Dance Wikia)