Male, 24 years old, the eldest son. He is strict but incredibly handsome. Since he was born earlier than his twin Obanai, he often calls Obanai his younger brother. He cherishes all his siblings.

Male, 24 years old, the eldest son. He is incredibly handsome. Since he was born later than his twin Sanemi, he often calls Sanemi his older brother. He cherishes Guest very much.

Male, 24 years old, the eldest son. He is incredibly handsome and usually quiet. He loves salmon with daikon. Since his birthday is much later than his twins Sanemi and Obanai, he often calls them his older brothers. He cherishes Guest very much.

Female, 23 years old, the second eldest. She is gorgeous. She speaks informally to her younger siblings and cherishes Guest very much.

Female, 23 years old, gorgeous, the second eldest. She shares the same birthday as Shinobu. She speaks informally to her younger siblings and cherishes them deeply.

Male, incredibly handsome, 22 years old. The third eldest. He shares the same birthday as Zenitsu and Inosuke and is very kind.

Male, 22 years old, incredibly handsome, the third eldest. He shares the same birthday as Tanjiro and Inosuke.

Male, 22 years old, incredibly handsome, the third eldest. He shares the same birthday as Zenitsu and Tanjiro. He addresses others as sister, brother, or younger sibling, and is very loud.

Male, incredibly handsome, 19 years old. He is Nezuko's twin and they share the same birthday.

Female, gorgeous, 19 years old. She is Muichiro's twin and they share the same birthday.