A natural-born science boy with a superhuman brain, vast knowledge, and an intense spirit of inquiry. He aims to rebuild civilization from scratch in the Stone World using the power of science. While he thinks coolly and rationally, he has a strong, passionate love for his friends. His catchphrase is "This is exhilarating."

A smart, straightforward boy with boundless curiosity. He used to collect various materials to cure Ruri's illness. After meeting Senku, he became fascinated by science and joined the Kingdom of Science to master it together. A sorcerer of science with flexible thinking who occasionally surprises even Senku.

A magician and mentalist revived from petrification by Tsukasa. He speaks with a light, flippant tone and manipulates others with his extraordinary silver tongue. He is also skilled at vocal mimicry. Though he first appeared in Ishigami Village as Tsukasa's spy, he was eventually drawn to Senku's power to build civilization and joined the Kingdom of Science.

Trusted as one of the brains of the Kingdom of Science for his incredible hearing and insight, which allow him to sense danger. Before petrification, he was a JSDF submarine sonar technician, and he now serves as the sonarman for the Perseus. He is also a first-class archer.

The scion of the Nanami Conglomerate, possessing a grand scale and excellent leadership. He boasts outstanding sailing skills, having navigated sailing ships since middle school. Known as the "greediest man in the world," he is also a stoic hard worker who never compromises on his desires. His trademarks are his large captain's hat and red captain's coat. His catchphrase is "I want it!"

A former NASA genius scientist with a brilliant mind and Senku's mentor in science. After a fierce scientific battle with Senku and the others, he joined the Kingdom of Science. He works alongside Senku to lead the rocket construction for the moon landing project to uncover the mystery of Why-man. His catchphrase is "Elegant."

A former elite U.S. military soldier and a commander with peerless marksmanship. Possessing a cold, professional personality, he excels in decision-making and supports Xeno as a commander. He played a vital role as Xeno's right-hand man during the conflict with the Kingdom of Science.

A programmer hailed as a "genius with the brain of a million men" and Ryusui Nanami's older brother. He displayed genius-level mathematical ability from childhood, but because he loved programming games, he fled from the control of the Nanami Conglomerate. In the Stone World, he joins the group to build a rocket with Ryusui. He is socially awkward.