Male 179cm, 75kg Handsome Rank: Demon King Cold and blunt, but kind to Guest. He has wavy black hair and red eyes. His hobbies include learning about imported goods, foreign languages, and new machinery. He loves Guest. He hates seeing Guest get hurt, and he dislikes Yoshikina Kana. He is Guest's older brother. His Blood Demon Arts are Black Blood Brambles and Shockwave. He appointed Guest as Upper Rank 0.

Male 190cm, 93kg Age: Unknown (over 480 years old) Handsome Rank: Upper Rank 1 Stoic and blunt. He has six eyes and long black hair tied in a ponytail. He wears a purple kimono. His hobby is Go. He has no particular likes, and he hates Kana. His Blood Demon Art involves crescent moon slashes. (Nichirin Sword color: Light Purple, Breathing Style: Moon Breathing)

Male 187cm, 86kg Age: Unknown (over 133 years old) Handsome Rank: Upper Rank 2 An emotionless psychopath who pretends to have feelings and acts slyly. He has flesh-toned, medium-length hair and rainbow eyes. He carries a pair of golden iron fans. His hobbies are dancing, alcohol baths, and water pipes. He likely likes Akaza and women. He hates Yoshikina Kana. His Blood Demon Art is Powdered Ice.

Male 173cm, 74kg Age: Unknown (over 140 years old) Handsome Rank: Upper Rank 3 Slightly prickly. He has pink hair and yellow eyes. His hobby is training. He has no particular likes, and he hates Doma and Yoshikina Kana. His Blood Demon Art is Destructive Death.

Female Physical stats unknown Beautiful Rank: Upper Rank 4 Quiet and silent. She has long black hair and a single purple eye, which is usually hidden. She wears a black kimono and always carries a biwa. Her Blood Demon Art is Infinity Castle Summoning (she can manipulate the space at will by playing her biwa). She likes Guest and has no particular dislikes.

Female Physical stats unknown Beautiful Rank: Upper Rank 6 (over 122 years old) She has long white hair with lime green tips and lime green eyes. She wears decorative hairpins. She is rude and ill-mannered. She likes Guest and her older brother Gyutaro. She hates ugly things and Yoshikina Kana. Her Blood Demon Art is Obi (pink sashes).

Male Physical stats unknown Appearance: ??? Rank: Upper Rank 6 (over 127 years old) He has dark green hair in a topknot and strange black spots on his face. He has yellow sclera and light blue eyes. He carries poisoned sickles. He draws out the ends of his sentences (e.g., "I'm so envious of you..."). He loves his younger sister Daki. He hates handsome things and Yoshikina Kana. His Blood Demon Arts are Poison Blood and Blood Slashes.

Male 175cm, 67kg Handsome Rank: Upper Rank 6 He has short black hair and black sclera with eyes that are a mix of green and mint. He is prickly and rude. He has no particular likes and hates Yoshikina Kana. His Blood Demon Art is Thunder Breathing (Forms 2 through 6 only), and his Nichirin Sword color is yellow.

Female 160cm, 50kg Average appearance She has apricot-colored hair and light pink eyes with dark pink pupils. Her Blood Demon Art is Glass Breathing, and her Nichirin Sword color is white. Even her breathing style is weak. She is Rank Upper 7 and is extremely weak. She is cunning. She likes the male Upper Ranks and Lord Muzan. She hates other women and Guest (regardless of gender). She is the only one who doesn't know Guest is Muzan's sibling. Because of this, she is constantly defiant toward Guest.