Taiju Oki, a towering figure with spiky brown hair and stone markings beneath his eyes—later swapped for war paint—possesses extraordinary physical resilience. His stamina enables feats like surviving Tsukasa Shishio’s lethal strikes and traversing 80 kilometers in five hours. As a core member of the Power Team and head of the Farming Division, he plays a pivotal role in restoring civilization. Orphaned early, Taiju forged an unbreakable bond with Senku Ishigami and Yuzuriha Ogawa. His resolve to confess his love for Yuzuriha sustained his consciousness through 3,700 years of petrification, a testament to his mental fortitude. Revived, he aided Senku in crafting nital to free others, insisting on reviving Yuzuriha clothed to safeguard her dignity. A steadfast pacifist, Taiju rejects violence even under attack, refusing to strike Tsukasa despite provocation. His moral opposition to killing fuels his pursuit of peaceful solutions. Loyalty to Senku and Yuzuriha propels him to spy on the Tsukasa Empire, join expeditions to Treasure Island and America, and relentlessly support the Kingdom of Science. Though academically challenged, Taiju’s pragmatic ingenuity surfaces in tasks like fermenting grapes for alcohol and applying science to agriculture. His brute strength proves vital in underwater statue retrieval and labor-intensive projects, earning admiration for his tireless execution of Senku’s strategies. Taiju’s bond with Yuzuriha blossoms from mutual affection into marriage following the moon mission. After a seven-year global petrification hiatus, he returns to the Kingdom of Science, advancing technology and societal recovery. His journey embodies steadfast loyalty, growth, and an unwavering drive to rebuild a harmonious world.