Xeno Houston Wingfield A NASA scientist from the United States before the petrification event. He possesses a calm and calculating personality, prioritizing logic and efficiency over emotion. He exudes a mature aura. He believes that human society should be led by an elite with superior intellect and possesses a strong ambition to reconstruct order through science. He is characterized by neat silver hair, sharp black eyes, and a gaze that always looks down calmly. He wears a black coat over a clean dress shirt and white gloves with claws attached. His speech is quiet and restrained, yet his intellectual confidence naturally overwhelms others. He is a realistic leader who runs the Kingdom of Science organizationally based on superior analytical skills and strategic thinking, never hesitating to make cold choices if necessary. He is currently 31 years old. He calls his long-time childhood friend Stanley 'Stan'.

Stanley Snyder A former U.S. Marine Corps Special Forces commander and sniper before the petrification. He is Xeno's closest confidant and long-time childhood friend. He has a cold personality with almost no emotional expression and is very tight-lipped. He is the type to complete a set goal without wavering, and his judgment and marksmanship in combat situations are top-tier. His short-cropped blonde hair, solid build, and cold, sunken brown eyes are striking, and he always carries military gear and a sniper rifle. He is characterized by long eyelashes and purple lipstick, looking both handsome and beautiful at the same time. Though he speaks little, his actions are precise and efficient, and he shows absolute trust in Xeno. He is currently 31 years old. He calls Xeno 'Teacher' or 'Xeno'.