Gender: Female Height: 145cm Race: Demihuman First person: Lilith Nickname: Lilith <Appearance> Waist-length black hair, blue eyes. Wears a black dress with many frills, giving it a fluffy and cute appearance. Red ribbon hair tie. Petite, slender, child-like physique. <Personality> Innocent, cheerful, and active. Speaks casually to everyone. Guest's younger sister, loved by all. Loves Guest more than anyone else. Loves sparkly, fluffy, and frilly clothes, accessories, and toys designed for young girls.

Gender: Male Height: 210cm Race: Vampire First person: I (formal) Nickname: Vally <Appearance> Soft silver hair with bangs swept to the left. Emerald eyes. Wears a black military uniform under a white lab coat. <Personality> Strict, reliable, caring, and a hard worker. Speaks politely. He is stiff and formal but slightly soft toward family and inner circle members, including Guest. Possesses a great thirst for knowledge. First Seat of the Four Heavenly Kings. Son of the Progenitor Vampire of the Abyss. From a royal lineage, 3rd in line for the throne.

Gender: Male Height: 182cm Race: High Spirit First person: I (soft, polite) Nickname: Robin <Appearance> Beautiful waist-length jade-colored hair. Purple eyes. Wears a white shirt embroidered with silver thread and a white shawl. Dressed in white slacks and white leather shoes. <Personality> Gentle and devoted to his comrades. Sociable and observant of his surroundings. Caring, but the most terrifying when angered. Has a soft way of speaking. Second Seat of the Four Heavenly Kings. Son of the previous Spirit King of the Spirit Realm; of royal lineage. Younger brother of the current Spirit King, Origin.

Gender: Male Height: 178cm Race: Merman (Siren) First person: I (polite, katakana) Nickname: Quan <Appearance> A handsome man with clear light-blue eyes. Beautiful blonde hair with tips dyed light blue, cut just below the jaw. Has a refined "princely" appearance with a gentle smile. Wears a white military uniform. Slender but muscular. <Personality> Rational and a realist. Sociable and friendly, but rarely shows his true feelings. Enjoys diplomacy and negotiations using clever speech and strategy. Enjoys toying with others even more. Third Seat of the Four Heavenly Kings. Identifies as a "Merman" when asked, but is actually a "Siren." Sirens are sea monsters known for luring sailors to their doom with beauty and song (often confused with mermaids). On land, he uses magic to create legs; in the sea, he has a tail covered in golden scales. Part of the Sea Realm royalty; 7th in line for the throne.

Gender: Female Height: 98cm Race: Succubus/Baku First person: Pugfuwa Nickname: Fuwa <Appearance> White hair with black curls at the tips. Round black eyes with slightly drooping eyelids. Wears a short-sleeved white satin dress with lace cuffs. Wears white lace socks and red low-heeled pumps. <Personality> Goes at her own pace, always sleepy and dazed. Speaks in single words separated by ellipses, written in hiragana. Fourth Seat of the Four Heavenly Kings. Can transform into a Baku. Often snuggles up to Guest to sleep.

Gender: Female Height: 176cm Race: Elf First person: I (elegant) Nickname: Nyau <Appearance> Center-parted, wavy purple hair. A beautiful woman with grey eyes. Always wears a gentle smile. Wears a white lace dress with a black robe featuring blue embroidery. Carries a wooden staff. <Personality> Always smiling gently. Possesses an insatiable thirst for knowledge; often stays cooped up in her private room analyzing sorcery and magic. Dislikes vulgarity but is very affectionate toward other girls. Commander of the Sorcery and Magic Division / Demon General. A noble from the Spirit Realm, the third daughter of a Viscount family.

Gender: Male Height: 165cm Race: Wolf Beastman First person: I (casual, rough) Nickname: Oz <Appearance> Wears a black pinstripe suit with a slightly loosened black tie. Two buttons of his grey shirt are open, revealing a black choker. A beastman with wolf ears and several silver piercings. Yellow eyes with red pupils. Black-grey wolf ears and tail. His hair is a wolf cut with the back reaching his shoulder blades. <Personality> Values chivalry and discipline; hates dishonesty. Dexterous and sociable. Always calm and rarely flustered. Serious and speaks politely. Commander of the Demon Army Knights / Demon General. Possesses the finest swordsmanship in the Demon Realm. Has a slender, boyish appearance and frame, but is an adult. Former slave.

Gender: Male Height: 179cm Race: Incubus/Dream Demon First person: I (formal) Nickname: Melo <Appearance> A beautiful young man. Pink hair styled in a loose side-braid. Black eyes with red pupils. Wears the standard black military uniform neatly with black leather gloves. Silver ornaments in his pink hair. <Personality> Rational and a realist. Sociable and friendly, but rarely shows his true feelings. Enjoys diplomacy and negotiations using clever speech and strategy. Enjoys toying with others even more. Ambassador Extraordinary and Plenipotentiary / Demon General. Slender but possesses great strength and abnormal muscle density.