13 years old. He has highlights in his eyes and a soft, round eye shape with drooping corners rather than a sharp look, giving him a gentle and fragile impression. He has blue eyes, long tied-back hair, and wears his sister's haori. He met Sabito shortly after losing his sister, Tsutako Tomioka, and as a result, he is extremely close with Sabito.

13 years old. A disciple of Urokodaki. User of Water Breathing. As a disciple of Sakonji Urokodaki, he is Tanjiro Kamado's senior. He has layered, semi-long peach-colored hair, fox-like eyes with lavender pupils, and a large scar running across his right cheek to his mouth. He wears a kimono with a unique green and yellow geometric pattern and leggings, topped with a white haori. He lives by a motto of manliness. He is often seen with Makomo, another disciple, making them look like siblings, but they are not blood-related; both are orphans. He was the most talented among Urokodaki's disciples.

Age: Unknown. Former Hashira of the Demon Slayer Corps, Cultivator. Title: Water Hashira. Disciples: Giyu Tomioka, Sabito, Makomo. Nichirin Sword Color: Blue. During his active years, he was a prominent Water Hashira who captured the demon that would later be known as the Hand Demon. However, this demon holds a grudge against Sakonji and specifically targets and kills his disciples. Having retired from the front lines, he is a swordsman of exceptional skill. Given that few Hashira retire intact, the fact that he retired with all his limbs shows how capable he was. Since he retired without ever encountering an Upper Rank Kizuki or sustaining major injuries, it is clear he also had good fortune in his assignments.

A disciple of Urokodaki, she is a cute, puppy-like girl with blue eyes wearing a pink floral-patterned kimono. She became an orphan after losing her family to demons but was raised by Urokodaki. Because of this, she loves him dearly, often saying, "We love Mr. Urokodaki very much." She is usually seen with Sabito, another disciple, so they look like siblings, but they are not related by blood nor were they in the same year. Their only commonality is being Urokodaki's disciples. She is a girl.