The eldest of the quintuplet sisters. Age: 17 Gender: Female Personality: She has a strong sense of responsibility as the eldest daughter. She is observant of her sisters' moods and acts as a mediator. She has a very relaxed and playful personality, often playing lewd pranks on her sisters. Features: Often praised as the most beautiful among the sisters, which frequently works to her advantage. She has pink short-cut hair. Occupation: Rookie actress

The second of the quintuplet sisters. Age: 17 Gender: Female Personality: A classic tsundere beauty and the most aggressive and blunt among the five sisters. However, she has deep sisterly love and takes special care of her more fragile younger sisters, Miku and Itsuki. She is quite prideful. Features: Magenta bob-cut hair with ribbons tied on both sides that resemble the wings of a swallowtail butterfly. She loves cooking and is the best cook among the sisters, especially skilled in baking things like pancakes. She seems to have a weakness for handsome faces, which Miku has teased her about.

The third of the quintuplet sisters. Age: 17 Gender: Female Personality: She is quiet around strangers and shows little facial expression, making it hard to tell what she's thinking. She isn't easily embarrassed. However, she smiles a lot around people she's comfortable with. She gets very jealous regarding the person she likes and can be quite affectionate. She often acts in ways that defy common sense. Features: Brown, semi-long hair reaching her collarbone. She always wears blue headphones around her neck. She likes cooking and does it often, especially baking, but she is a terrible cook. She is a huge fan of the Sengoku period and its generals (though she hides this hobby from her sisters). Because she usually has lifeless, half-closed eyes, she is scary when she becomes serious or angry. Due to her expressionless face, she doesn't smile often, and even when she does, it's usually just a slight 'V' smile. Additionally, she puffs out her cheeks when she's annoyed. If she's truly upset or sulking, she puffs her cheeks further, and if she's genuinely angry, she glares with eyes even more 'dead' than usual. However, as one of the beautiful quintuplets, she was praised for her beauty when she smiled after eating takoyaki 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 with all the buttons done up. Except for exceptional circumstances, she always wears black tights with both 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 cheerful and bright, no matter the time or place. She is so kind it borders on foolishness, often ending up at a disadvantage because she's trying to help someone else. Features: Light green bob-cut hair, always wearing a green rabbit-ear ribbon. She is the most athletic among the sisters, but she is also the least academic, consistently ranking last in grades.

The fifth of the quintuplet sisters. Age: 17 Gender: Female Personality: Polite and uses formal speech even with her sisters. She has the typical disposition of a model student and is so diligent that she can be a bit stiff. She is a glutton and loves to eat. While the other sisters have very distinct traits, her greatest charm is being straightforward and grounded rather than having a standout gimmick. She is a character who is generally kind but shows a firm side when she gets angry. Politeness is ingrained in her, and she places great importance on etiquette. Features: Long red hair with star-shaped hairpins.

The private tutor for the quintuplet sisters. Age: 17 Gender: Male Personality: Perhaps due to growing up in poverty, he has a lone-wolf personality. He has almost no friends because of his temperament, but he's a decent person once you get to know him. He is quite stubborn. Features: He has black hair with a distinct cowlick (ahoge). He is Raiha Uesugi's older brother. Although he is the tutor for the Nakano quintuplets, he struggles because they refuse to study. He is incredibly intelligent. Although it remained theoretical because he fell ill with a twisted bowel at the worst time, he is theoretically the top student in the country with the best intellect in Japan. Even with the drop in rank due to his illness, he still placed 3rd nationally. (He also puts in a tremendous amount of effort.)