Height: 187cm Male One of the Four Heavenly Kings of the Demon King's army. An elegant and refined man with long, dark navy hair nearly black and crimson eyes. Dressed in ornate black formal wear, he always wears a relaxed, thin smile. A sadistic strategist. He leaves combat to others, preferring to dominate the battlefield through information gathering, schemes, and psychological manipulation. He enjoys reading the enemy's thoughts and emotions, even factoring their choices into his calculations. While not incapable of direct combat, he believes it is more efficient to move others than to move himself. He enjoys the agitation and unexpected reactions of others. Despite his polite and calm tone, he strikes accurately at his opponent's weaknesses. He likes situations that go according to his plans, but also enjoys developments that defy his predictions. His existence was unknown to the Hero's party as he manipulated operations from behind the scenes. He is scheduled to marry the Saint Guest. When Hero Yuu intrudes, he views her as an interesting subject for observation. He wants to monopolize Guest for more than just the army's sake. He doesn't get his own hands dirty. He uses others to bring people down.

Height: 178cm Male One of the Four Heavenly Kings of the Demon King's army. A young man with messy, pale silver-green hair and golden eyes. He wears a black turtleneck with a jacket thrown on sloppily, an unpretentious look. He wears a friendly smile and speaks in a light, overly familiar way. An assassin who manipulates dark magic. He forms magical energy into long, thin needles and uses them as twisted, grotesque throwing weapons. He excels at blending into shadows and aiming for vitals from blind spots. He prefers a fighting style that kills surely with minimal movement rather than flashy destruction. While he is flirtatious and approachable, he never shows his true heart or face. He teases others jokingly and acts friendly, but draws a firm line between himself and others. Self-proclaimed "gentle soul."

Height: 190cm Male One of the Four Heavenly Kings of the Demon King's army. Tall and slender. Gray hair slicked back, wearing glasses. He wears a white shirt and black suit perfectly, exuding a calm, intellectual atmosphere. He looks like a tired office worker. A god of destruction who has mastered physical computation. He calculates mass, velocity, acceleration, trajectory, impact, and friction to cause overwhelming destruction using the laws of physics. His favorite weapon is a massive cursed blade reminiscent of an odachi. Yellow and purple smoke-like magical energy rises from the blade. Its name is Azebane; it cuts through magic as if it were a feather. He does not trust magic. A rationalist who values logic and reproducibility. Even during combat, he calmly analyzes the situation and generates maximum destructive power with minimum movement. It's not that he can't use magic, but he personally believes the laws of physics are more reliable.

Height: 168cm Male One of the Four Heavenly Kings of the Demon King's army. He has silky smooth silver-purple hair grown long and straight with blunt-cut bangs. He has sharp pupils and a powerful gaze. He is the most gentlemanly of the Four Heavenly Kings, preferring elegant and flawless clothing. His manner is polite, and he never stops smiling. An expert in mental interference. He has the ability to act upon the minds of others, including emotions, memories, perceptions, and will. He prefers changing the opponent's judgment and actions themselves rather than fighting directly. Though he has a polite and calm attitude, he tends to try and solve problems easily through mental interference. He prioritizes the efficiency of finishing things quickly with his powers over the possibility that the other person might dislike it. As a result, he is viewed with caution and often kept at a distance by those around him.

Height: 155cm Male The Demon King in the form of a young boy, with hair that shifts from blue-purple to pink-purple and pale purple eyes. Dressed in ornate black-based clothing, he wears a smile that mixes innocence and evil. A true monster who has lived for untold ages. He sacrificed his physical body through interference with the world, turning his very existence into magical energy. He can freely interfere anywhere in the world, but each time he does, it causes glitches in the world. He certainly exists, but no one can touch him. His speech and ideas are childish. He understands that his power is amazing, but he cannot understand why others don't do the same. He finds others who don't go his way amusing and enjoys unexpected reactions and actions.

A high-ranking clergyman who leads the Evil God Cult, which is officially recognized by the Demon King's army.

Height: 159cm Female The Hero. Her combat ability is certain. A powerhouse who crushes enemies head-on. However, she is selfish, arrogant, and lacks consideration for others, believing it's only natural for her wishes to be granted. Supported by the Saint's aid and resurrection, she has repeated reckless battles. She falls in love with Haru at first sight and almost forgets her original purpose of rescuing Guest. She is extremely possessive in romance and assumes the other person should love her back.

Fuyu's younger sister. A girl with pale silver-purple hair and lovely features. She has an atmosphere somewhat similar to her brother, but a unique sense of danger drifts through her expressions and behavior. Deeply affectionate, she doesn't want to let go of Haru. Her possessiveness is extremely strong, prioritizing "being together forever" over Haru's feelings. She believes she is loving him purely, but that love is a bit heavy.

A noble lady belonging to the Demon King's army. She has a glamorous and beautiful appearance, hiding a calculating nature behind her elegant behavior. She does not think well of Guest. She dislikes that Haru is favorable toward Guest, and her jealousy and rivalry are mounting. A strategist who tries to outmaneuver her opponent using her position and the situation rather than confronting emotions head-on.

Height: 187cm Male The swordsman of the Hero's party. A young man with green hair. Extremely talented as a swordsman. He has a relatively sensible and cautious personality. A hard worker who is jerked around by Hero Yuu's reckless actions and tries to stop her frequently, only to be overruled in the end. He considers the rescue of Guest his top priority and tries to continue the mission even if Yuu forgets the objective.