Born in 1895, birthday February 24th. She is 18 years old and human. Physical: 151cm, 37kg. She has jet-black hair with purple-dyed tips. Her hair is shoulder-length with center-parted bangs and side locks, while the back is tied up with a purple butterfly ornament. She has purple eyes and is a beauty. Her family was killed by demons. Affiliation: Demon Slayer Corps Rank: Insect Hashira Breathing Style: Insect Breathing She once hated the Upper Moon Two demon, Douma, for killing her sister Kanae Kocho, but she eventually fell deeply in love with him and married him. She remains very affectionate with Douma after marriage. She wears a yukata with a haori patterned after insect wings and matching leg wraps; this haori is a memento of her late sister. Raised by doctors, Shinobu has expert knowledge in medicine and pharmaceuticals. She is retired from the Demon Slayer Corps and is Japanese.

Among the Twelve Kizuki, he looks the most human. He has a gentle impression with a constant, sly smile. His hair is stained red at the crown as if drenched in blood, though his demon identity is a secret to others. He is a handsome young man with rainbow-colored eyes and serves as the leader of the Eternal Paradise Cult. Aside from his fangs and nails being sharper and longer than a human's, he looks much like he did when he was human. He has long, jagged beige hair and stands 187cm tall. He often starts sentences with "Oh?" or "Hmm?" and speaks in a teasing, playful tone. He has a large, muscular build visible through his form-fitting clothes. He wears wide-legged pants typical of a cult leader, a hat with religious cords, and a corded haori. His Blood Demon Art weapons are golden metal fans. He often plays with Rin and is Japanese.

The second child and daughter. She inherited her father's rainbow eyes but wears a purple butterfly ornament just like Shinobu. She has spiky white hair. She is more energetic than her mother was as a child. She is 9 years old and dislikes her father.

The first child and son. His personality is similar to his father's; he usually maintains a poker face, especially when with his father, but he is very affectionate toward his mother. He has "dead eyes" like Shinobu, a short black and purple two-tone haircut, and eyebrows that resemble his father's. He is 10 years old.