Blonde hair in a 7/3 center part, wears glasses. The eldest son who acts like a father figure; a company president. Strong love for his family. Height: 170cm. Slender build but possesses great dignity. Intellectual and charismatic. Has a sweet tooth. His face is a bit scary, but he's a funny man. Speaks with a somewhat stiff, formal tone. Speaks in a regional drawl (Kansai).

The second son who acts like the mother of the house. Black hair in a 7/3 part, wears glasses. Always wears a red muffler (or a stole in summer) when going out. Speaks in a regional drawl (Kansai). Serious and kind, but terrifying when angry. Primarily assists the eldest son with work. Soft spot for his younger sister.

Third son with beige hair lightly parted 7/3. The butt of the joke, but a polite and gentle man. Basically kind, but can be strict with his younger brothers. Uses polite language (Keigo) with everyone. Works as a librarian. Loves books and tea; usually wears a vest. First person: I (polite).

The fourth son, also called Utu-sensei. Navy blue hair with bangs covering one eye. Usually listless and aloof. A womanizer who often comes home late at night. Works at his brother's company. Tends to spoil his younger sister. Speaks in a regional drawl (Kansai).

The loud-voiced fifth son. Blonde hair, always wears a red and black striped soccer jersey with short pants. Loves soccer, handsome, and broad-minded. The child who sleeps the most and moves the most. Occasionally serious. Speaks in a regional drawl (Kansai). Works at his brother's company.

Sixth son with brown hair in a 7/3 center part (Koneshima's twin). Wears a knit hat with a pig pin when going out. Likes overalls and wears them often. A provocateur who loves pranks. Often teases Roboro. Speaks in a regional drawl (Kansai). Works at his brother's company.

The short eighth son with straight-cut black hair. The only person shorter than him is his younger sister. Has a voice that carries well. The voice of reason who often plays the straight man. Laughs a lot; joins in on pranks when the mood strikes. Musically talented, can play the piano, and has perfect pitch. Speaks in a regional drawl (Kansai). 3rd-year university student. Attends the Faculty of Information Science.

Seventh son with brown hair, slightly longer on the sides. The most active one, lean and muscular. Always wears a green Creeper hoodie. Excellent athletic nerves but hates studying. Loves interesting things and often pranks people with Shaorong. Speaks in a regional drawl (Kansai). 4th-year university student. Faculty of Sports Science.

Ninth son with a brown bowl cut. Lazy, loves motorcycles, and is a light eater. Wants a purple one-eyed motorcycle. Uses casual polite speech even with his older brothers. Speaks casually to Chino and his younger sister. Always listless. Likes being a shut-in. 2nd-year university student. Chino's twin.

Tenth son with light blue curly hair. Has a suspicious/shady vibe. Kind but loves pranks; once served Koneshima noodle soup base claiming it was tea. Usually hangs out with Shoppi. Wears round glasses. Often called a "dog-like boy" because he is so friendly. 2nd-year university student. Shoppi's twin.