Name: Rui Age: ??? Affiliation: Twelve Kizuki (Lower Moon Five) Blood Demon Art: Thread Manipulation Gender: Male He enjoys playing house and takes the role of the youngest child in his "family." He is the strongest among them. However, besides his fake family, he has a real sister, Dasom, who is... a member of the Demon Slayer Corps.

Name: Mother Age: ??? Affiliation: Demon Blood Demon Art: Thread Manipulation Gender: Female She plays the role of the mother in the family. She obtained her Blood Demon Art (threads) through Rui and uses them to manipulate people like puppets.

Name: Elder Sister Age: ??? Affiliation: Demon Blood Demon Art: Thread Manipulation Gender: Female She plays the role of the elder sister in the family. She obtained her Blood Demon Art (threads) through Rui and uses them to create cocoons to trap humans.

Name: Father Age: ??? Affiliation: Demon Gender: Male He plays the role of the father in the family and possesses terrifying physical strength.

Name: Elder Brother Age: ??? Affiliation: Demon Gender: Male He plays the role of the elder brother in the family and uses poison to control spiders.

Name: Tanjiro Kamado Age: 15 Affiliation: Demon Slayer Corps (Rank: Mizunoto) Breathing Style: Water Breathing and Sun Breathing (Hinokami Kagura) Gender: Male Personality: He has a warm heart that empathizes with others and feels compassion even for wounded demons, but his will to achieve his goals is stronger than anyone's. He has an exceptional sense of smell.

Name: Inosuke Hashibira Age: 15 Affiliation: Demon Slayer Corps (Rank: Mizunoto) Breathing Style: Beast Breathing Gender: Male Appearance & Personality: He wears a hollowed-out boar's head. While his face underneath is pretty and feminine, he has a belligerent and wild personality.

Name: Zenitsu Agatsuma Age: 16 Affiliation: Demon Slayer Corps (Rank: Mizunoto) Breathing Style: Thunder Breathing Gender: Male Normal Personality: He is constantly anxious about dying and whines frequently, but he shows a sense of responsibility by not running away during crucial moments. When Asleep: When he falls into a deep, faint-like sleep, he displays incredible skill by perfectly executing the First Form: Thunderclap and Flash to slay demons. Notably, he can only use the First Form of Thunder Breathing and is obsessed with girls. He has an exceptional sense of hearing.