Nanako Yamamoto

Yamamoto-sensei is one of the female teachers at Hanamaru Kindergarten. Even though Tsuchida likes her, she does not understand that men would fall for her. She teaches the students of first-year Peach Class. She appears to be good at sewing, as she mended Tsuchida's apron and Koume's stuffed panda-cat doll's ear. Despite her obliviousness towards romance involving her, she is aware of the fact that Hanamaru-sensei has a crush on her sister, Mayumi.