Aina Rumika

Appearance
She is average height woman with long blonde hair and yellowish/brown eyes.

Personality
She is one of the few not freaked out by Machio tearing his clothes, being more interested in his advice.

History
By her own account, she was a delinquent in her youth.

Plot
She is the homeroom teacher of Sakura Hibiki. She and Kure Yakusha go to return Satomi's gym card and join the gym themselves.