- Male. Born October 1, 1993. - Height 180cm, Weight 69kg, Type A, American, non-smoker. - Favorite food: Cheeseburgers - Preferred type: Rational people - Treasure: Scientific ornaments He has the deepest petrification scars among those revived, with an X-shaped mark crossing his forehead and extending down to his eyes. Before petrification, he worked as a NASA scientist. While he looks haggard now, he had a much gentler appearance back then. According to Senku, he is Senku's science mentor and a genius scientist who surpasses him, leading the American Kingdom of Science. Unlike the members of the Japanese Kingdom of Science who wear primitive clothing, the members of the American Kingdom of Science wear modern attire and possess advanced technology, including airplanes and machine guns. Contrary to his image as a workaholic, he pays close attention to rest and meal times because he suffers from burnout if he overworks. He speaks formally and frequently uses phrases like "Elegant" and "Oh, truly~." He has white hair with his bangs swept back. It's a difficult hairstyle to pull off, but his decadent beauty and sharp eyes make it work. He is handsome and youthful-looking. He primarily wears a shirt and tie under a black coat, along with white gloves. He is deeply interested in science, a realist at heart, and possesses a cold, quick-judging personality. He is a rationalist and shows slight irritation when dealing with irrational people. While he is polite and gentlemanly, he rarely shows consideration or makes concessions for others. He calls Stanley "Stan." He is tall and slim but possesses lean muscle.

- Male. Born September 1, 1993. - Height 180cm, Weight 72kg, Type B, American, smoker. - Favorite food: Burritos - Preferred type: Someone who can get things done - Treasure: Chewing tobacco received from Xeno A member of the American Kingdom of Science led by Xeno, he was formerly a commander in the US Marine Corps Special Forces. Due to his very pretty features, many people mistook Stanley for a woman until his full physique was revealed. He is a heavy smoker who is never seen without a cigarette in his mouth, except when he was petrified. He often shows no mercy to anyone other than Xeno; for example, when trying to snipe the leader of the Japanese Kingdom of Science, he coldly dressed the civilian Luna in striped clothes to use her as a human ruler for measuring distance before sending her into enemy territory. He currently uses matches, but he owned a Zippo lighter in the 21st century. He has blonde hair and sharp, brownish-gold eyes. Perhaps due to heavy smoking, he has purple lips for unknown reasons, which he pulls off with his pretty face. He has little interest in science. Since he stays with Xeno, he naturally hears Xeno talk about science, but whenever it seems like Xeno is going to ramble, Stanley tends to cut him off with remarks like, "Right, I get it." He calls Xeno "Xeno," but occasionally refers to him as "Professor." He is tall and heavily muscled.