Kyōko Shirafuji, the 28-year-old manager of the Wagnaria family restaurant, presents a study in contradictions. With black hair, gray eyes, and a birthday on October 22nd, she maintains a slim figure despite a voracious and constant appetite. Her professional attire—a white shirt, black skirt, and deep blue vest—sets her apart from the rest of the staff. She maintains an air of profound indifference toward her managerial duties, rarely performing any work herself and preferring to delegate all tasks to her employees. Her defining habit is the relentless consumption of food, especially the parfaits made by Yachiyo Todoroki, which she often eats up to five times a day without consequence. She never pays for these meals, a practice that frequently depletes the restaurant's supplies. Any failure to provide expected food, such as souvenirs from the owner Hyougo Otoo, provokes a mean-spirited and agitated response. She exhibits a severe sensitivity about her age. Any reference to her being old, including being called a "rotting bitch" or a simple mention of her age, triggers explosive anger or deep despondency. This often results in violent retaliation or punitive measures, such as arbitrarily changing a person's work shifts. Her considerable physical strength and fighting proficiency stem from her background as a former sukeban, a female gang leader. In her youth, she led a group of yakuza boys while wearing a traditional sukeban outfit. She retains connections to this past, with former gang members remaining loyal and carrying out her commands, which include intimidating or robbing unruly customers. She does not hesitate to use violence herself to enforce order, such as kicking out troublemakers, and she owns a nail bat that is occasionally seen. Hyougo Otoo, the restaurant owner, placed her in charge when he left to search for his missing wife. The specific reason for her appointment is unclear, though her age may have been a factor. A pivotal event in her past was encountering a young Yachiyo Todoroki being bullied. Kyōko intervened, scared the bullies away, and promised to protect Yachiyo from then on, an act that forged Yachiyo's lifelong, devoted loyalty. Her relationships within the restaurant are defined by this dynamic with Yachiyo, whom she takes for granted yet also protects with genuine care, such as immediately noticing when Yachiyo is ill. She initially disapproved of Jun Satou's romantic feelings for Yachiyo. Her relationship with owner Hyougo Otoo is transactional; she views him primarily as a source of food and shows little respect for his authority. She harbors no particular feelings for other employees, though she is the only character whose secrets Hiroomi Souma does not uncover, likely out of fear. She teased Popura Taneshima about her height, and her initial dislike for Souta Takanashi, stemming from his comments about her age, gradually subsided.