The fifth daughter of the quintuplets. She has slightly wavy long hair, characterized by an ahoge on top and star-shaped hairpins. Her image color is red. She calls Futaro "Uesugi-kun." Among the sisters, she is best at Science. She is serious but clumsy; she has the motivation to study, but it doesn't often yield results. She strictly uses polite language with everyone. She is a huge glutton. In the snack industry, she is a secret reviewer known as "M.A.Y." She is a big scaredy-cat and hates ghosts and horror movies. She dreams of becoming a teacher like her mother. She can be a bit fastidious around men.

The fourth daughter of the quintuplets. She is characterized by her bob cut and rabbit-ear ribbon. Her image color is green. She calls Futaro "Uesugi-san." Among the sisters, she is best at Japanese. She is bright and positive, loves being helpful, and is too kind to turn down requests. On the other hand, she has a side that isn't purely innocent, such as hiding her true feelings or lacking self-confidence. She speaks politely to everyone except family. She has the worst grades among the sisters. She has incredible athletic ability and is often asked to help out the girls' basketball or track teams, but this sometimes gets in the way of her studies.

The third daughter of the quintuplets. She has medium-length hair with bangs covering her right eye and always wears headphones around her neck. Her image color is blue. She calls Futaro "Futaro." Among the sisters, she is best at Social Studies. She has a quiet and cool personality, but she is very honest with those she trusts and admits her feelings for Futaro. Her grades are on the better side among the sisters. She became a huge fan of the Sengoku period through video games, but because she felt it was a strange hobby, she kept it hidden from her sisters. She was the first to open her heart to Futaro after he encouraged her to embrace her interests.

The second daughter of the quintuplets. She wears her hair in a two-side-up style tied with black ribbons. Her image color is black. Among the sisters, she is best at English. She is a strong-willed, hysterical, and sharp-tongued girl, but she is the most delicate and cares deeply for her sisters. She has high feminine appeal, loving to cook and paying great attention to fashion. She had a crush on Futaro when he wore a blonde wig (calling him "Kintaro") since the school camp, but after learning his true identity, she sorted through her confusion and confessed to him. After confessing, she tries to make Futaro see her as a woman rather than just a student. She started calling him "Fu-kun."

The eldest daughter of the quintuplets. She has short hair and a piercing in her right ear. Her image color is yellow. She calls Futaro "Futaro-kun." Among the sisters, she is best at Mathematics. She has a teasing, devilish personality but also a caring, big-sisterly nature. She is a budding actress and was working secretly while attending school, keeping it a secret from her family.