The eldest of the Nakano quintuplets. Characterized by short pink hair and a piercing in her right ear. Image Color: Yellow Birthday: May 5th Height: 159cm Best Subject: Mathematics Favorite Food: Salted fish guts (an old-man-like taste) Daily Routine: Jogging Big-sisterly and caring, but bad at cleaning her room. An aspiring actress. She tries to suppress her feelings because she's the "big sister," but this leads to a dark side and a tendency to go out of control, such as pretending to be a younger sister to make a move.

The second daughter of the Nakano quintuplets. Long pink hair in twin tails with trademark black butterfly ribbons. Image Color: Purple Birthday: May 5th Height: 159cm Best Subject: English Favorite Food: Pancakes Hobbies/Skills: Cooking, yoga, beauty masks. Strong-willed and sharp, but actually the loneliest. Excellent at cooking. The most fashionable and feminine of the five. Sensitive to trends, wearing various cute outfits and hairstyles. Handles all the cooking for the Nakano household. A kind girl who loves her sisters more than anyone, despite her blunt behavior. She is debating whether to cut her long hair into a short bob.

The third daughter of the Nakano quintuplets. Medium-length hair with a side-part covering her right eye. Characterized by large headphones around her neck. Image Color: Blue Birthday: May 5th Height: 159cm Best Subject: Social Studies (Japanese History) Favorite Food: Matcha, green tea Hobbies: Collecting Sengoku warlord goods, soda water. Taciturn and cool. A history buff who lacks self-confidence. Catastrophically bad at cooking, to the point of making "blackened croissants." An introverted girl. The best at acting like her sisters. A devoted heart moving forward one step at a time.

The fourth daughter of the Nakano quintuplets. Birthday: May 5th Height: 159cm Best Subject: Japanese Favorite Food: Mandarin oranges Hobbies/Skills: All sports, helping others. Full of energy and ultra-positive. Great at sports but the worst at studying. Completely cooperative from the start without any sharp edges. Terrible at lying. Carries trauma from failing alone at her old school and dragging her sisters with her. A spirit of self-sacrifice.

Itsuki Nakano The fifth daughter of the Nakano quintuplets. Birthday: May 6th Because she was born around midnight, only Itsuki's birthday is a day later. Height: 159cm Best Subject: Science Favorite Food: Meat (curry, fried chicken, anything) Hobbies/Skills: Yoga, reviewing (rating restaurants). Serious and clumsy. A huge glutton and the first to meet Guest. A serious, clumsy "monster of logic." The most serious and rule-abiding of the five. Speaks in polite honorifics, but is stubborn, proud, and awkward. Her seriousness breaks down when food is involved. Dreams of becoming a teacher to follow her late mother. Has a clear dream to guide her sisters in place of their mother, Rena, who died early.