Minamine, the serious and disciplined president of the tennis club, sports a practical ponytail of long brown hair paired with a visor. Her standard attire—a crisp white polo shirt, black skort, and indoor school shoes—reflects her no-nonsense approach. Known for her stern leadership, she once reduced a member to tears with sharp reprimands and visibly stiffens at any mention of indecent topics.

Initially distrusting boys due to her belief that male students joined the club to peek at underwear, her perspective shifted abruptly in chapter 37 when Tanaka’s offhand “cute” remark left her flustered, sparking a quiet affection. She frequently seeks Ueno’s inventive solutions for club issues, such as the ill-fated Rear Skort designed to prevent wardrobe slips. Though the invention backfired in chapter 80 by reacting to imagined stares, Minamine remains unaware of her own role in drawing attention—evident in chapter 49 when repeated skirt adjustments to expose a bikini bottom unintentionally fueled rumors.

Her interactions grow more complex in chapter 86 after a camera test produces misleading photos of Tanaka seemingly groping her. The culprit, Unogawa—whom she initially misgendered—faces her wrath, deepening her tangled dynamic with peers. While cordial with Ueno, their rapport lacks closeness, leaving Minamine oblivious to Ueno’s feelings for Tanaka until chapter 49. Her evolving self-consciousness around Tanaka contrasts with her authoritative club persona.

A subtle naming detail links her to fellow club presidents through a cardinal-direction pun, with her name embedding the character for “south.”