Oniyashiki Yukari

Hometown: Mie Prefecture
Likes: Alcohol, tobacco
Dislikes: Hangovers

Hiroki's homeroom teacher. She hates troublesome situations and often wonders why did she become a teacher in the first place. However, she has lots of experience and she often shares her thoughts with her students. Secretly, Yukari is a bookworm and a former student of Sennosha private school. She is also Komachi's old friend and is often annoyed at how she keeps sharing embarassing secrets about her.