The female ninjas are smarter, more skilled, and more mature than the first year students. The three main kunoichi characters are Yuki, Tomomi, and Shige. Those three often pick on Rantarou, Kirimaru, and Shinbei as well as the rest of 1st year hagumi class.

Family Name: ?
Given Name: Yuki
Age: 11

Yuki could be considered the leader of the three girls since she has a take charge personality.

Family Name: ?
Given Name: Tomomi
Age: 11

Tomomi is the kunoichi class president. Tomomi is nicer and a little more caring than Yuki, but that doesn't stop her from picking on 1st year hagumi.

Family Name: ?
Given Name: Shige
Age: 11

Shige is a nice person. She often helps Shinbei blow his nose. I guess you could say that she's his girlfriend.

Family Name: Yamamoto
Given Name: Shina
Age: ?

Yamamoto-sensei teaches the kunoichi class. Since Yamamoto-sensei often switches appearances between an old and a young lady, no one really knows how old she is. Even the teachers don't know her age.