A second-year student at Sobu High who, despite having decent grades, athletic ability, and looks, has maintained his status as a loner due to his uniquely cynical and twisted way of thinking. When dealing with requests brought to the Service Club, he often employs solutions based on his negative values that leave everyone around him appalled.

A beautiful second-year girl at Sobu High and the president of the Service Club. She doesn't mingle with her classmates and speaks the blunt truth without hesitation. While she initially clashed with Hachiman over his methods, she has secretly developed feelings for him.

Hachiman's classmate and a member of the Service Club. Although she appears to be a bright, trendy girl, she has a habit of constantly reading the room and trying to fit in. She joined the club out of admiration for Yukino's ability to express herself directly. Like Yukino, she is attracted to Hachiman.

A female Japanese language teacher who serves as the advisor for the Service Club and is also in charge of student guidance.