Ponoka-sempai, an upperclassman in the manga club, oscillates between methodical logic and whimsical unpredictability, wielding an octopus jar or clay pot to absurdly resolve conflicts—often by shoving peers into these containers. Though her calm facade often fractures into surreal antics mirroring the series’ chaotic tone, she maintains a gentle initial demeanor. Her indigo hair flows into a small ponytail, complementing a lilac dress edged in red trim, black lace accents, and a red skirt, completed by short black socks and brown shoes. Despite her vivid appearance, she fades into the background in certain scenarios, overlooked by peers. Lacking defined backstory or growth, she persists as a secondary fixture, her episodic interventions resetting without continuity. A shell-shocked expression she displays during a forex market crash scene spawned an internet meme representing financial loss, later leveraged in a promotional partnership with a forex firm.