Torako Koshi, nicknamed "Koshitan," is a third-year student at Prefectural Hino Minami High. She meticulously cultivates an image as the ideal honor student, serving as both class representative and student council president, renowned for academic excellence, athletic prowess, and universal admiration. This persona masks a significant secret: her delinquent past in middle school, where she was known as the "Tiger of Hino" and led a local gang. She reinvented herself upon entering high school, dedicating a year to becoming a model student to leave that past behind. Physically, Torako possesses long blonde hair fading to a light pink or orange gradient at the ends, featuring two horn-like tufts and an ahoge. Her eyes show a purple-pink gradient. She wears a traditional sailor-style uniform: a white blouse, light blue scarf, navy blue pleated skirt, grayish-black knee-high stockings, and brown penny loafers. Torako's personality centers on the struggle to maintain her perfect image while suppressing delinquent impulses. She flusters easily, particularly regarding romantic gestures like love letters or discussions of her love life, often reacting with intense blushing. Threats to her reputation, such as being observed singing to a deer, trigger embarrassment and outbursts. Her composure frequently shatters due to Noko Shikanoko, a deer-human hybrid classmate who instinctively detects Torako's secrets. When stressed or provoked, Torako exhibits delinquent mannerisms—a deeper voice, threatening language, and sharp glares. She resents being the sole voice of reason during chaos and hates her past being exposed. Genuine passions include collecting stuffed animals (which she kisses nightly), writing poetry and songs in a secret notebook, enjoying shonen manga, and indulging in children's anime as a guilty pleasure. Her favorite food is tamago kake gohan. Beyond academics and athletics, Torako demonstrates strong leadership skills, managing multiple roles. She co-renovated an abandoned warehouse into the Deer Club's meeting space, revealing talents in construction and interior design. She practices gardening with potted plants in the clubroom and possesses basic sewing skills. Her charisma, refined during her reformation, allows effective influence and leadership. Notably, she exhibits fourth-wall awareness, acknowledging her existence in a fictional narrative and interacting with the audience. Torako's development focuses on her evolving relationship with Noko and gradual self-acceptance. Initially horrified when Noko exposes her delinquent past in class, she reluctantly cooperates to protect her secret. Noko's absurd behavior—involving her in explosive antler incidents or Deer Club chaos—forces Torako to confront her suppressed identity. Key moments include a violent outburst during a sports festival where her delinquent persona resurfaces fully, and her eventual realization that peers accept her despite her past. Interactions with her sister Anko, who has a possessive complex, complicate her life, as do responsibilities with eccentric Student Council members. By later stages, she exhibits greater resilience, balancing honor student duties with unpredictable friendships, though she still struggles with stress-induced health issues like ulcers. Her relationships are pivotal: Noko is both her biggest irritant and closest friend, often inadvertently helping her embrace authenticity. Anko's jealousy initially manifests in violent schemes against Noko, but Torako maintains a protective, if wary, bond. As Deer Club president, she mentors members like Meme Bashame, displaying patience amid their eccentricities. Her student council presidency requires navigating conflicts with rivals like Neko Nekoyamada, who seeks to undermine her authority.