Tsuruhime attends Basara Academy as a student fortune teller. Her prior sheltered life renders her notably naive, especially concerning interpersonal relationships and social dynamics, making her susceptible to manipulation within the school. Despite this innocence, she actively engages in the academy's conflicts and competitions alongside other student warlords, fiercely protective of her homeland sea—a core motivation extending into the school setting. Her combat style relies on archery, specializing in long-range engagement, though specifics within the academic context remain undefined.

Within the school narrative, she retains her characteristic purity and earnestness. She interacts with classmates embroiled in power struggles following the student council chairman's suspension, though her specific role in these leadership conflicts is not detailed. Her portrayal remains consistent as a determined yet innocent figure navigating the academy's rivalries.