Sanari Misumi stands 155 centimeters tall, weighing 46 kilograms, with physical measurements of 87-50-84 centimeters. She has brown eyes and long brown hair frequently styled in ponytails, half-updos, or side parts, often adorned with ribbons. Her standard attire is a Koudaya waitstaff uniform featuring a miniskirt, thigh-high stockings, suspenders, and a bow tie.

Representing Koudaya as a waitress, she entered a martial arts tournament due to her longstanding rivalry with closest friend Yuu Asuka. Upon learning of Yuu's participation, Sanari impulsively applied last-minute seeking a legitimate match, unaware of the tournament's rules regarding consequences for defeated combatants. Trained in unarmed combat, she competes using martial arts. Her storyline culminates in a first-round match against Yuu, ending in Sanari's defeat. Following tournament protocols, this loss results in her public humiliation before the audience.