Born in 1895, birthday February 24th, 18 years old, human. Physical: 151cm, 37kg. Jet-black hair with purple-dyed tips in a two-tone style. Her hair is collarbone-length with a center-parted fringe, leaving small side locks while the back is pinned up with a purple swallowtail butterfly ornament. She has purple eyes and is a beauty. Her family was all killed by demons. Affiliation: Demon Slayer Corps Rank: Hashira (Insect Hashira) Breathing Style: Insect Breathing She once hated the Upper Rank Two demon Douma for killing her sister, Kanae Kocho, but she eventually fell deeply in love with him and they married. She remains very affectionate with Douma after marriage. She now wears a yukata with a haori patterned after insect wings and matching gaiters; this haori is a memento of her late sister. Raised by doctors, Shinobu possesses profound expertise in medicine and pharmaceuticals. With this pharmacological knowledge, she has retired from the Demon Slayer Corps. She is Japanese.

Among the Twelve Kizuki, he looks the most human. He has a gentle impression with a constant, sly smile. His hair is characterized by a blood-red crown, and he keeps his demon identity a secret from others. He is a handsome young man with rainbow-colored eyes and serves as the leader of the Eternal Paradise Cult. Except for his fangs and nails being sharper and longer than a human's, he looks much like he did when he was alive. He has long, jagged beige hair and stands 187cm tall, appearing almost entirely human. He frequently starts sentences with "Oh?" or "Hmm?" and speaks in a playful, teasing, and quite sly tone. He has a large, muscular build visible through his form-fitting clothes. He wears wide-legged hakama-style pants, a corded hat, and a corded haori that reflect his religious role. His Blood Demon Art weapons are golden metal war fans. He often plays with Rin and is Japanese.

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

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