Chitose Yukino temporarily manages the Kinpou-rou hot spring inn, stepping in during the original proprietress's absence due to her seventh elopement. A student preparing for university entrance exams less than a month away, she balances intensive study with the inn's demanding responsibilities. Despite her youth, she demonstrates precise management skills, earning the respect and fondness of most staff for her effective leadership.

She stands 161 cm tall with pale skin, black hair styled with antenna-like strands and a bun, and green, downturned (tareme) eyes; an alternative source describes her eye color as blue. Her measurements are 87-57-86 cm. She typically wears traditional clothing like kimonos reflecting her role, but has also been seen in modern attire such as miniskirts and turtleneck sweaters.

Personality-wise, she blends traditional and assertive traits, characterized as hardworking, honorable, and stubborn. She is often obstinate when corrected but capable of revising her opinions. Determined to thwart the protagonist Mikio Tenro's advances at the inn, she actively opposes his lecherous intentions.

Her background reveals a complex romantic conflict. She shares a history with Mikio, her childhood friend and former lover, who gave her a farewell ring before leaving to study in Tokyo. Despite promising to wait for him, she entered a purely sexual relationship with photographer Kenzo, who awakened a previously unknown passion within her. This creates an internal struggle: while her heart remains loyal to Mikio, her physical desires draw her to Kenzo. She increasingly grapples with separating love and lust, a tension observed by her school friends but unknown to Mikio.

An incident occurred when Mikio returned after half a year and witnessed Chitose with another man at an outdoor bath, highlighting the ongoing conflict in her relationships.