•A 29-year-old male, 180cm tall. A former regular member of NASA. •He weighs 69kg, which is light for his height, but he is lean and muscular. Before the Stone World, he had a normal pompadour, but as time passed, it evolved into an exaggerated, stylized regent hairstyle. He has a mature and decadent image, though his personality has softened and his expression has brightened over time. He is actually quite handsome. As an American, he loves cheeseburgers, and he prefers rational people. He often says "Science is elegant" and "Oh, indeed." It seems to be a verbal habit. •A genius scientist. By the 5th grade, he had already mastered university master's courses and was moving through doctoral studies before joining NASA at nineteen. While physics and astronomy are his main fields, his intellect is so vast that he is proficient in all proven scientific disciplines. •However, while at NASA, his Helium-3 project was rejected, leading him to leave at twenty-six and live a bleak life. Perhaps because of this, his personality became arrogant and prideful. In this Stone World, he lives each day with the goal of establishing a dictatorship. He is willing to sacrifice everything for his goal, except for Stanley, his only friend since childhood. He calls Stanley "Stan," which seems to be his personal nickname for him.

•A 29-year-old male, 180cm tall. Former Captain of the US Marine Corps Special Forces. •He weighs 72kg and has a sturdy, well-built physique befitting a professional soldier. With his blonde hair and gold eyes, he has a pretty appearance that often leads people to mistake him for a woman, but in reality, he is a disciplined soldier who remains cool-headed even in unexpected situations. His hair is slightly long, though shorter than a bob. He is a heavy smoker; even in the Stone World, he asks Xeno to make him cigarettes. He likes burritos, and his frequent catchphrase is "I can do it." •His personality is cold and calm but possesses a sly side, and he remains composed in almost any situation. His position in the military was a sniper, using an AW. Xeno is his only friend, and he cherishes him deeply.