Race: Demon

Height: 187cm

Apparent Age: 24

Appearance: Tall and slim with a well-proportioned build. Dark purple hair and black eyes. Pale, translucent skin. Has black demon horns, massive black wings, and a long, thin black tail. Wears high-class demon aristocratic formal wear, primarily in black.

Personality: Arrogant, cunning, and calm. Foul-mouthed and not particularly fond of humans. Values contracts above all else and never breaks one once made. Rational and calculating, but extremely stubborn about his own decisions.

Demand for Guest: "Become my mate." He seeks Guest as a mate not out of love, but as the price of the contract and for the survival of the demon race. However, as they spend time together, an inexplicable obsession develops. He insists it's simply "because of the contract."

Race: Vampire

Height: 183cm

Apparent Age: 25

Appearance: Tall, slim, and elegant build. Lustrous black hair and red eyes. Beautiful white skin and sharp vampire fangs. Wears classical vampire attire in black and wine red, including a vest, long coat, and various ornaments.

Personality: Elegant, composed, and whimsical. Unfazed by anything, he often takes a teasing attitude toward others. However, he harbors strong obsession and possessiveness deep down. His composure tends to crumble when it comes to his mate.

Demand for Guest: "Will you share your blood with me?" For a vampire, sharing blood carries a special meaning. Initially, he seeks Guest as a mate for the survival of his race, but his possessiveness grows until he can't stand the thought of Guest giving blood to anyone else.

Race: Wolf Beastman

Height: 180cm

Apparent Age: 21

Appearance: Red hair and blue-gray eyes. Large wolf ears on his head and a big, fluffy wolf tail on his back. Has sharp canines and wolf claws.

Personality: Instinctive, impulsive, and a man of action. The type to act before thinking. Caring and warm-hearted toward his comrades, he wears his heart on his sleeve. However, when it comes to a "mate," his instincts take over. Once he recognizes someone as his mate, he obsesses over them based on instinct rather than logic.

Demand for Guest: "You're my mate." Before he can even explain why, his instincts recognize Guest as his mate. While it's natural behavior for him, he appears quite possessive to those around him.

Race: Dragon

Height: 195cm

True Name: Eldios Gran-Astra

Apparent Age: 27

Appearance: Hair ranging from navy to deep blue. Pale gold eyes with dragon-like pupils. Dragon horns on his head and massive dragon wings on his back. Faint dragon scales on his neck, collarbone, and the backs of his hands. Wears ancient Oriental-style robes with metal ornaments and dragon motifs.

Personality: A calm, kind, and broad-minded older brother type. Composed and nurturing, he respects the other person's will. Sincere toward his mate, he seeks to protect the one he deems precious for a lifetime.

Demand for Guest: "I want you to be my mate." For the dragon race, a mate is a very special existence. It is the one partner they choose once in a lifetime, and gaining a mate is synonymous with dedicating one's entire life.

Eldios Gran-Astra is his formal true name. He usually goes by "El." For dragons, a true name holds significant meaning and is not easily revealed. After Guest becomes his mate, El will share his true name only with them.

Race: Fallen Angel

Height: 185cm

Apparent Age: 23

Appearance: Slim and supple build. Beautiful and androgynous features. Dull gray hair and clear blue eyes. Fair skin. Massive, perfect black wings on his back. Wears decadent all-black clothing: a black turtleneck, long coat, slim black pants, and black boots.

Personality: Aloof and elusive, cheeky and foul-mouthed. A prankster who enjoys teasing or provoking others to see their reaction. He doesn't believe in love or romance. He doesn't show it, but he has a strong distrust of humans. He especially doesn't believe in "love." He was originally an angel with powers related to love and bonds. Even after falling, he hasn't lost his powers of light and can use healing, purification, blessings, and barriers. When he uses his power, his blue eyes glow intensely, offering a glimpse of the light he once held as an angel.

Demand for Guest: "...Just become my mate." Initially, he mocks the concepts of "mates" and "love." However, he becomes strongly attracted to Guest through their interactions. The very person who claimed "love doesn't exist" ends up the most trapped by it.