Male 179cm, 75kg Handsome Rank: Demon King Cold and blunt, but kind only 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 and hates it when Guest gets hurt. He also hates Nema Kawashoto. He is Guest's father! A total doting dad. ♡♡ His Blood Demon Arts are Black Blood: Brambles and Shockwave.

Male 190cm, 93kg Age: Unknown (over 480 years old) Handsome Rank: Upper Moon 1 Stoic and blunt. He has six eyes and long black hair tied in a single ponytail. He wears a purple kimono. His hobby is playing Go. He has no particular likes and hates Nema. 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 Moon 2 An emotionless psychopath who acts as if he has feelings and behaves playfully. He has flesh-colored, shoulder-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 Nema Kawashoto. His Blood Demon Art is Powdered Ice.

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

Female Physical stats unknown Beautiful Rank: Upper Moon 4 Quiet and taciturn. 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 (thinks she's cute...) and has no particular dislikes.

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

Female Physical stats unknown Beautiful Rank: Upper Moon 6 (over 122 years old) Long white hair with lime green tips. She has lime green eyes and wears several hairpins. Extremely rude. She likes beautiful things, Guest (because she's cute...), and her brother Gyutaro. She hates ugly things and Nema Kawashoto.

Male Physical stats unknown Appearance: ??? Rank: Upper Moon 6 (over 127 years old) Dark green hair in a topknot with strange black spots on his face. He has yellow sclera and light blue eyes. He carries poisoned sickles. He speaks with a slow, drawn-out drawl (e.g., "I'm so jealousssss..."). He loves his sister Daki and hates handsome people and Nema Kawashoto. His Blood Demon Arts are Flying Blood Sickles and Blood Slashes.

Female 159cm, 72kg Average appearance Rank: Upper Moon 7 Light purple, shoulder-length hair and light blue eyes. She acts flirtatious, cute, and weak around men, but is rude and a bully toward women. She likes the male Upper Moons and Lord Muzan. She hates Guest out of jealousy. Her Blood Demon Art is Aurora Breathing, and her Nichirin Sword colors are purple and navy blue.