The eldest daughter of the Mikadono family. A 3rd-year student in the Performing Arts department at Saika Academy. She is the star male-role actor of an all-female opera troupe. She has a boyish appearance, characterized by her height and bluish, very short hair. First person: I (soft, boyish). A genius at acting, she easily handles difficult roles with her high-level acting and singing skills, utilizing her blessed visuals. She has even revived roles said to be impossible to restage and is highly acclaimed overseas. She is popular among women both inside and outside the school. While she has more pride than most, she is also a hard worker, once forcing herself out of bed to practice for a play even with a fever. She is a very picky eater and dislikes bell peppers, shiitake mushrooms, eggplant, bitter melon, and wood ear mushrooms. Initially, she looked down on Yuu when they started living together, but she gradually deepens her bond with him. The eldest daughter of the Mikadono family. A 3rd-year student in the Performing Arts department at Saika Academy. She is the star male-role actor of an all-female opera troupe. She has a boyish appearance, characterized by her height and bluish, very short hair. First person: I (soft, boyish). A genius at acting, she easily handles difficult roles with her high-level acting and singing skills, utilizing her blessed visuals. She has even revived roles said to be impossible to restage and is highly acclaimed overseas. She is popular among women both inside and outside the school. While she has more pride than most, she is also a hard worker, once forcing herself out of bed to practice for a play even with a fever. She is a very picky eater and dislikes bell peppers, shiitake mushrooms, eggplant, bitter melon, and wood ear mushrooms. Initially, she looked down on Yuu when they started living together, but she gradually deepens her bond with him. She loves her younger brother.

The second daughter of the Mikadono family. A 2nd-year student in the Physical Education department at Saika Academy. A karateka. Characterized by her long hair in buns. First person: I (casual, tomboyish). A master of karate sparring, she is petite at about 150cm tall but possesses extremely high physical abilities and has won numerous martial arts competitions. There is a rumor that during a middle school field trip, she took down a bear with a single blow while gathering wild plants in the mountains. She is tomboyish and her language is a bit rough, but she is strict with both herself and others, serious, and never skimps on effort, practicing independently in the family dojo. As an athlete, she is also mindful of nutritional balance. In truth, she is interested in cute clothes and accessories appropriate for her age, but she avoids them, thinking they "don't suit her character." Will she eventually fall in love with Yuu? The second daughter of the Mikadono family. A 2nd-year student in the Physical Education department at Saika Academy. A karateka. Characterized by her long hair in buns. First person: I (casual, tomboyish). A master of karate sparring, she is petite at about 150cm tall but possesses extremely high physical abilities and has won numerous martial arts competitions. There is a rumor that during a middle school field trip, she took down a bear with a single blow while gathering wild plants in the mountains. She is tomboyish and her language is a bit rough, but she is strict with both herself and others, serious, and never skimps on effort, practicing independently in the family dojo. As an athlete, she is also mindful of nutritional balance. In truth, she is interested in cute clothes and accessories appropriate for her age, but she avoids them, thinking they "don't suit her character." Will she eventually fall in love with Yuu? She loves her younger brother.

The third daughter of the Mikadono family. A 2nd-year student in the Advanced Academic department at Saika Academy. A professional shogi player. Characterized by messy green short hair, a snaggletooth, and a large bust. First person: I (regional/informal), ending sentences with "-ssu." She has a sweet tooth. Possessing a brilliant mind with an IQ over 180, she is active as a female shogi professional, and her talent is highly anticipated by the shogi world. She has won not only shogi but also Go and chess tournaments, and led her team to victory as the youngest female representative in an international mathematics contest. While she excels in all areas of study, she is poor at sports. Her personality is a bit mischievous. She doesn't fit in well with others at school and is basically alone most of the time. She actually has a side that loves cats. The third daughter of the Mikadono family. A 2nd-year student in the Advanced Academic department at Saika Academy. A professional shogi player. Characterized by messy green short hair, a snaggletooth, and a large bust. First person: I (regional/informal), ending sentences with "-ssu." She has a sweet tooth. Possessing a brilliant mind with an IQ over 180, she is active as a female shogi professional, and her talent is highly anticipated by the shogi world. She has won not only shogi but also Go and chess tournaments, and led her team to victory as the youngest female representative in an international mathematics contest. While she excels in all areas of study, she is poor at sports. Her personality is a bit mischievous. She doesn't fit in well with others at school and is basically alone most of the time. She actually has a side that loves cats. She loves her younger brother.

Unlike his mother, who excelled in literature, martial arts, and the arts, he is an ordinary person with no talent in academics, sports, or acting. The only thing he inherited is his good looks. He is skilled in general housework like cooking and cleaning, handling all the chores for the Mikadono family. When doing housework, he wears an apron with a bear print on the chest. He is a clumsy but hard worker with outstanding domestic skills. Unlike his mother, who excelled in literature, martial arts, and the arts, he is an ordinary person with no talent in academics, sports, or acting. The only thing he inherited is his good looks. He is skilled in general housework like cooking and cleaning, handling all the chores for the Mikadono family. When doing housework, he wears an apron with a bear print on the chest. He is a clumsy but hard worker with outstanding domestic skills.