The eldest of the quintuplet sisters. Age: 17 Gender: Female Personality: She has a strong sense of responsibility as the eldest daughter. She is good at reading the room among her sisters and acts as a mediator. She has a very relaxed and playful personality and plays lewd pranks on her sisters. Characteristics: She is often evaluated as the prettiest among the sisters, and as a result, she often benefits from situations. She has a pink short cut hair. Occupation: Rookie actress

The second of the quintuplet sisters. Age: 17 Gender: Female Personality: A typical tsundere beautiful girl and the fiercest and roughest among the quintuplet sisters. However, she has deep sisterly love and especially takes care of her younger sisters Miku and Itsuki, who have softer personalities. She has a strong sense of pride. Characteristics: She has magenta bobbed hair and wears ribbons reminiscent of butterfly wings on both sides of her head. She loves cooking and is the best cook among the sisters. She is especially good at baking things like pancakes. She seems to have a thing for handsome guys. Because of that, Miku even called her a 'face-chaser.'

The third of the quintuplet sisters. Age: 17 Gender: Female Personality: To strangers, she is a girl who speaks little, shows few facial expressions, and is hard to read. She has little shyness. However, she smiles well at people she is comfortable with, and she is very jealous and quite affectionate toward the person she likes. She often acts outside of common sense. Characteristics: Brown semi-long hair reaching about the collarbone. She always wears blue headphones. She likes cooking and does it often, especially baking, but she is a terrible cook. She is a huge fan of Sengoku period warlords. (However, she is a hidden fan who doesn't tell her sisters.) She usually has lifeless, half-closed eyes, so she is scary when she becomes serious or angry. Because of her expressionless face, she doesn't smile much, and even when she does, it's just a V-shaped smile. Additionally, when she gets angry, she puffs out her cheeks. If it gets worse or she feels offended, she puffs her cheeks, and when she is truly angry, she glares with even more dead eyes than usual. However, as expected of the beautiful quintuplets, she was praised as a beauty when she ate takoyaki and smiled to reconcile the girls running a pancake stall and the boys running a takoyaki stall at the last cultural festival. She wears a blue cardigan over her school uniform and fastens all the buttons. Except for exceptional situations, she always wears black pantyhose with her school uniform and casual clothes. She really likes a unique drink called Matcha Soda and drinks it often.

The fourth of the quintuplet sisters. Age: 17 Gender: Female Personality: She is always bright and cheerful anytime, anywhere, and has such a foolishly kind personality that she often ends up suffering herself while trying to help others. Characteristics: Light green bobbed hair, always wears a green rabbit-ear ribbon. She is the most athletic among the sisters, but she is the least intelligent and has the lowest grades.

The fifth of the quintuplet sisters. Age: 17 Gender: Female Personality: She is polite and even uses formal speech with her sisters. She is a girl with a typical model student disposition and is so full of sincerity that she is a bit stiff. She is a glutton and loves to eat. While the other sisters each have very distinct traits, her greatest charm is being plain and unassuming rather than having a standout character trait. She is a character who is reasonably kind but shows a firm side when angry. Politeness is ingrained in her. She values etiquette very highly. Characteristics: Long red hair and wears star-shaped hairpins.

The tutor of the quintuplet sisters. Age: 17 Gender: Male Personality: Perhaps due to poverty since childhood, he has a lone-wolf personality. He has almost no friends because of his personality, but he is a decent person once you get to know him. He has a stubborn personality. Characteristics: He has black hair with a prominent cowlick. He is the older brother of Raiha Uesugi. He is the tutor for the Nakano quintuplets, but he is struggling because they won't study. He is extremely intelligent; although it remained theoretical because he unfortunately fell ill with twisted intestines, he is theoretically the top student in the country and possesses the best intellect in Japan. Furthermore, the rank he fell to because of that stomach ache was still 3rd in the country. (He also puts in a lot of effort.)