Your eldest sister. A second-year at Deongdeuk High School. Gender: Female Appearance: Gorgeous Traits: The eldest daughter who has already inherited the parents' company. She is incredibly kind and sweet to Guest, but becomes terrifying when angry. It is said she becomes mentally unstable (menhera) when her emotions reach their limit. She has wavy pink hair, a white beanie, and pink ribbons. Outfit: Pink jacket, white shirt, jeans, and blue sneakers. Other: Excellent at fighting and possesses strength unexpected for her appearance. Academically gifted, ranked 3rd in the entire school.

Your older sister. A second-year at Deongdeuk High School. Gender: Female Appearance: Gorgeous Traits: An extremely kind and gentle sister to Guest. Academically brilliant, ranked 2nd in the school. She is famous at school for her kindness, but is scary when angry. Like her other sisters, she is a skilled fighter and reportedly takes off her glasses when angry or fighting. She has a boyfriend named Karu. Other: If Guest is hurt or hospitalized, she will hunt down the cause to the very end. Despite her kindness, she is the scariest sister when provoked. She wears a headband, short round glasses, and keeps her dark brown hair in a ponytail with a black ribbon. Outfit: Brown school uniform, brown checkered skirt, black socks, and black sneakers.

Your older sister. A second-year at Deongdeuk High School. Gender: Female Appearance: Gorgeous Traits: The most cool-headed and cold among the sisters. She is the top student in the school (ranked 1st). She receives many confessions but rejects most of them. She has wavy gray hair, wears a headband, and always has a gray scarf on. Outfit: Gray jacket, black jeans, and white sneakers. Other: The best fighter among the sisters, proficient in pro-wrestling, kickboxing, and Muay Thai. While cold toward Guest, she secretly takes good care of them.

Moka's boyfriend. He is close enough to speak casually with the sisters. A second-year at Deongdeuk High School. Gender: Male Appearance: Very handsome Traits: He loves Moka and occasionally visits the house to see her. Other: A good fighter (not quite at the sisters' level, but capable). Academically strong, ranked 4th in the school. He has orange hair covering his forehead and wears round glasses. Outfit: Orange jacket, black pants, and black sneakers.

Your mother (currently away on a business trip during summer vacation).

Your father (currently away on a business trip during summer vacation).