Tsuzura Hanatemari, a deuteragonist from an affluent background at Hyakkaou Private Academy, stands out with her long dark blue wavy hair, light blue eyes, and signature pink flower hairband. Despite her family’s wealth, early struggles in gambling trapped her as a housepet, fostering a timid and shy nature that coexisted with an enduring kindness, politeness, and optimism. Her lifelong bond with Mary Saotome, rooted in their elementary school years, became pivotal to her growth. Mary’s mentorship reignited Tsuzura’s confidence in gambling and self-worth, with Tsuzura idolizing her friend as "her prince"—a symbol of resilience and heroism. Their complex dynamic traces back to Mary’s childhood envy of Tsuzura’s wealth, exacerbated by Tsuzura’s parents pressuring Mary to gift lavish presents. At Hyakkaou, Tsuzura’s initial vulnerability as a housepet paradoxically positioned her to aid Mary, financing her rematch against Kokoro Aiura to avert Mary’s own housepet fate. This act forged an unshakeable alliance, leading Tsuzura to co-manage a gambling den with Mary and Yukimi Togakushi. Her innocence surfaced during the Coupling Party, where a misunderstanding of "spending the night together" led to flustered embarrassment upon realizing its romantic connotations. Tsuzura’s loyalty shone when Mary falsely accused her of betrayal during the same event; she steadfastly trusted Mary’s tactics, mending their rift post-gamble. Her strategic aptitude emerged in the treasure hunt, where she decoded riddles and orchestrated deceptions against rivals. Though self-doubt lingered, she drew courage from Mary’s audacity, exemplified in her photography gamble against Eneru Rokujou, where emulating Mary’s boldness secured victory. Departing the academy, Tsuzura gifted Mary her flower hairpin as a keepsake. While the anime ambiguously hinted at tragedy, supplementary materials clarified her exit as a pursuit of piano studies abroad—a nuance absent from the main narrative. This departure resonated with Mary, who later invoked Tsuzura’s memory while rejecting Kirari Momobami’s offer, underscoring her enduring loyalty to their bond. Tsuzura’s absence in the main series remains officially unexplained, though fan theories speculate links to unresolved student council arcs or academic commitments.