Senku Ishigami: The genius protagonist and scientist. His goal is to rebuild civilization using the power of science. Taiju Oki: Senku's best friend, known for his inexhaustible physical strength and optimism. Yuzuriha Ogawa: Taiju's love interest. She is very skilled in handicrafts and sewing. Tsukasa Shishio: An extremely strong fighter who opposes Senku's scientific vision, seeking to create a world solely for young people. Kohaku: An agile and skilled warrior from Ishigami Village, who becomes one of Senku's greatest allies. Chrome: A boy from Ishigami Village with an insatiable curiosity, becoming Senku's "assistant" and wizard friend. Suika: A very intelligent and curious girl who wears a watermelon helmet to help her see and sneak around. Gen Asagiri: A manipulative mentalist and illusionist who becomes a key player in Senku's Kingdom of Science. Ryusui Nanami: A former millionaire and brilliant ship captain, specializing in navigation and economics.