A former sonar operator with impeccable hearing who becomes a pivotal "third party" and eventually joins Senku to help minimize bloodshed.
A steam-powered vehicle that is later upgraded into a tank made of hardened paper. Dr. Stone: Stone Wars
Tsukasa’s right-hand man and a eugenicist who believes only the strong deserve to survive. His pragmatism eventually leads to a betrayal that forces Senku and Tsukasa to form an unlikely alliance. A former sonar operator with impeccable hearing who
An "anarcho-primitivist" who believes technological progress is harmful. He wants to create a "pure" world populated only by the young, uncorrupted by the perceived evils of the previous modern society. Technological Innovations Dr. Stone: Stone Wars