|Birthday||August 18th (Leo)|
|Relations||Harima Kenji (cousin)
Harima Shuuji (cousin)
Osakabe Itoko is a teacher in school rumble, and she is also Harima Kenji's cousin. After Harima leaves home, she takes him in and allows him to live in her house. She often gets involved in Harima's love-life and can predict everything Harima does, to which she sets traps for him. She is often seen with Sasakura Yoko. All of the perverted boys in 2-C consider her to be the hottest teacher in school.
Itoko and Shuji are cousins but they are never seen interacting. It can be inferred from this that they do not have a close relationship.