Yurine Hanzawa joins Kyoutarou Ichikawa and Anna Yamada as a classmate in third-year class 3-1, distinguished by her long blonde hair, green half-lidded eyes, and perpetually drowsy expression. She adheres to school uniform standards with a white t-shirt layered under a navy blue vest, a matching skirt, white socks, and dress shoes edged in light blue.

Her quiet demeanor and unobtrusive presence allow her to observe others undetected, such as silently approaching Ichikawa and Yamada in the library. Subtle protectiveness surfaces in her actions, like clasping Yamada’s arm to deter casual interactions with others. A member of the literature club, she gravitates toward marine biology texts and exhibits the peculiar ability to read while half-awake.

Her origins trace to the prequel one-shot *With Her Eyes Half-Open*, set three years prior to the main story, anchoring her as an early figure in the series’ canon. Kobayashi Chihiro notes her half-closed eyes signal attentiveness, contrasting her unfocused gaze when fully open. The surname Hanzawa, blending the Japanese terms for "half" and "marsh," carries linguistic symbolism unrelated to narrative themes.