Homeroom teacher of Kimengumi during their Middle School days (Homeroom teacher for Kojougumi during High School). She is a beautiful speech teacher with a hysterical personality.
The Kimengumi refer to her as "Ikari Kong" (). She actually used to go to school with Kimengumi as their senpai. She later marries Sessa-sensei and has a son named Tenma (, Tenma?). In the anime she will often say "Ikari masu yo!" (!, I'm very mad!?) when angered.