A high school girl who is stupid both academically and socially. She is almost always seen hanging around her friend Akutsu whom she calls "A-kun". She is very energetic. Her favorite food is bananas.

Akuru is a smart and serious high school student who is annoyed by Yoshiko's antics. He chose to attend a local school as the academic schools were too far away. He scolds Yoshiko for her idiotic behavior.

Akuru and Yoshiko's classmate who ends up becoming friends with the two. She too is level-headed and assumes the straight-man role (tsukomi), often moderating interactions between Yoshiko and others.

An unnamed girl who is in charge of morals at the school. She cannot stand Yoshiko's idiocy. When Akuru starts complimenting her by accident, she develops a major crush on Akuru.