Taiju Oki stands as a towering, powerfully built figure with spiky brown hair and distinctive vertical stone markings beneath his eyes, which he later exchanged for painted war designs after his second revival. Renowned for extraordinary physical resilience, he is capable of covering 80 kilometers in five hours and enduring severe physical trauma, such as surviving direct kicks from Tsukasa Shishio without losing consciousness. His raw strength enables him to hurl massive boulders and subdue formidable adversaries like Oarashi. Despite these capabilities, he maintains an unwavering pacifist philosophy, refusing to retaliate against attackers and choosing to absorb punishment to shield others. Driven by a five-year unspoken love for Yuzuriha Ogawa, which sustained his consciousness through 3,700 years of petrification, he fixated on finally voicing his feelings upon revival. Aligning with Senku Ishigami, he collaborated to develop depetrification methods and reconstruct society. His loyalty led him to infiltrate the Tsukasa Empire as a covert operative, gathering intelligence while feigning loyalty. After rejoining the Kingdom of Science, he assumed command of the Farming Division, channeling his tireless energy into underwater statue recovery and crop cultivation. Taiju blends blunt honesty with moments of tactical ingenuity, such as applying scientific principles taught by Senku—like using crushed seashells to fertilize soil. Though academically challenged, he exhibits hands-on problem-solving abilities, exemplified by deciphering Senku's coded neck-cracking signals. His mental fortitude extends beyond initial petrification, retaining awareness through multiple stonifications—a rarity highlighted by Dr. Xeno. Post-timeskip, he resumed duties in the Kingdom of Science's lunar mission and married Yuzuriha in the story's conclusion. His role expanded to global initiatives, including expeditions to America, though newer characters gradually overshadowed his narrative presence. Throughout his journey, he persists as a symbol of non-violent resolve and collaborative spirit, merging brute strength with relentless emotional drive.