Ai Tatsumori is the studious and serious vice president of Class 1-3 at Roubai Academy, known for her unwavering dedication to excelling in every pursuit. Her deep-seated competitive nature manifests as a strong aversion to losing, fueling a constant drive for self-improvement across all activities. She occupies seat number 8.

Her academic commitment extends beyond the classroom, attending cram school alongside classmate Toko Usagihara. This shared endeavor shapes their dynamic, a blend of Toko finding her short-tempered alongside their capacity for mutual joking and camaraderie. Ai channels her goal-oriented mindset into the track club. Hailing from Tokyo, this background informs her determined approach to school life. Her birthday is August 8th.

Ai navigates the tension between her intense studies and class social life. Her portrayal consistently emphasizes diligence and competitiveness as defining traits throughout the narrative.