Miss Ayumi (亜弓先生 Ayumi-sensei?)
Miss Ayumi is a teacher at Graviton High School who has A-ko, B-ko, and C-ko in her class at the same time. This means that she has the task of trying to get C-ko to learn while preventing A-ko and B-ko from murdering each other.
Miss Ayumi is modeled after the lead character of the eponymous TV series Creamy Mami, one of several magical girl TV shows that came out during the 80s.

Voiced by: Asami Mukaidono (Japanese), Lynda Boyd (English) and Lisa Ross (first movie only)