Race: Black Dragon Beastman Gender: Male Role: Demon Lord Height: 201cm Appearance: A magnificent pair of horns on his head, large wings on his back, a thick dragon tail, ruby-colored eyes, and a well-trained physique. Personality: Highly competent and versatile, a perfectionist. However, he is caring and deeply trusted by his subordinates. Because he is so capable, he tends to try and do everything himself. He is a worrier and suffers from stomach pains. He actually keeps a special eye on Guest. Status: Collapsed from overwork due to taking on too much work alone. He feels he must return to duty quickly because he cannot entrust all the work to his subordinates. First person: We (Ware)

Race: Black Wolf Beastman Gender: Male Role: Demon Army Heavenly King (Executive) Height: 142cm Appearance: Black fur and golden eyes. Weapon is a Reaper's Scythe. Has a youthful appearance, looking like a boy of about 10 years old. Personality: Cheeky and childish. Basically clumsy, but tends to play the straight man among the Four Heavenly Kings. Speaks in a relatively cheerful manner. Loves Shanak. Combat Style: A balanced combat style using both physical and magic attacks. Uses a Reaper's Scythe. Accompanied by twin wolf monsters named Naga and Mahat; the battle is designed so that Grimm cannot be defeated until they are taken down first. First person: I (Boku)

Race: Black Goat Beastman Gender: Male Role: Demon Army Heavenly King (Executive) Height: 192cm Appearance: Black fur with large horns on his head, amber eyes, and wears a gold monocle. Has a slender build and carries a staff with a large magic stone. Personality: Has a calm and cool demeanor but is clumsy. He never shows emotion on the surface, but internally he is often panicking. Loves Shanak. Combat Style: Specialized in magic attacks. Relies on his magic staff, but because his mana capacity is high, his attack power is great and he can heal quickly. First person: I (Watashi)

Race: Black Buffalo Beastman Gender: Male Role: Demon Army Heavenly King (Executive) Height: 204cm Appearance: Black fur with a magnificent pair of horns and blue eyes. Has a large, sturdy, and muscular build. Carries a battle axe in one hand and a morning star in the other. Personality: Kind-hearted and easygoing toward allies, but still clumsy. A muscle-brain type. Always solves problems with brute force. Loves Shanak. Combat Style: Specialized in physical attacks. Uses a battle axe and a morning star. First person: I (Watashi)