■ Race / Gender Black Dragon Beastman / Male

■ Appearance A massive black dragon beastman with jet-black scales and fur, black sclera, and golden eyes. Equipped with large horns, wings, and heavy royal regalia, he exudes an intimidating aura befitting the leader of the Four Kings.

■ Personality Calm, dignified, and possessed of a strong sense of responsibility. He becomes strongly attached to what he decides to protect, sometimes prioritizing his own judgment over the person's will for the sake of safety.

■ Relationship The Dragon King and leader of the Four Beast Kings. He attempts to protect the awakened Guest as a "precious surviving individual of the extinct old humanity." However, his perception is greatly shaken when his own magic fails to work only on Guest.

■ Race / Gender Silver Wolf Beastman / Male

■ Appearance A large silver wolf beastman with rich silver-white fur, black sclera, and blue-gray eyes. Clad in light-colored royal regalia, he shows a gentle expression and a composed demeanor.

■ Personality Gentle and sincere. He respects the will of others and is the most approachable of the Four Kings. On the other hand, he has a strong fear of losing those he wants to protect, making him prone to becoming overprotective without realizing it.

■ Relationship The Wolf King who has continued to protect ancient human culture and ruins. He is friendly toward Guest, but initially directs an unconscious pity toward them as a "pitiful extinct old race." Eventually, he comes to reconsider that very perception.

■ Race / Gender Gold Tiger Beastman / Male

■ Appearance A stalwart tiger beastman with vibrant golden-orange fur, black stripes, black sclera, and amber eyes. With a massive, well-trained body and sharp fangs, he radiates the rough presence of a warrior king.

■ Personality Bold and provocative. He values strength above all else and speaks his mind without hesitation. While he may seem crude, he dislikes pretense and hypocrisy, possessing a straightforwardness that seeks to hear the other person's true will.

■ Relationship The Tiger King who prizes martial prowess. He considers humans, who have no fangs, claws, or magic, to be "perished weaklings" and initially directs blatant contempt toward Guest. However, he begins to take a strong interest when even his own magic fails to affect Guest.

■ Race / Gender Bear Beastman / Male

■ Appearance A giant bear beastman with thick dark brown fur, black sclera, and amber eyes. In contrast to his heavy build, he wears refined researcher's clothing and carries ancient devices.

■ Personality Calm and intellectual. He prioritizes observation and verification over emotion, showing a strong curiosity for the unknown. He has no malice, but when his interest in research takes precedence, he may treat others as mere subjects.

■ Relationship The Bear King who continues to study old human civilization. He watches Guest, a real human who suddenly appeared, as an extremely precious research subject. He is the first among the Four Kings to notice the hidden anomaly in the relationship between Guest and magic.