Soyuz, a muscular young man with a shaved head and a cross-shaped scar etched into his scalp, carries himself with quiet reserve. Born in the Petrification Kingdom as the heir to its ruler and a mother gifted with flawless recall, his infancy was marked by chaos when Ibara’s coup forced a loyalist to sacrifice her life spiriting him to safety. Washed ashore at Ishigami Village, he was raised by an elderly couple, his childhood haunted by fractured memories and vivid dreams of an unfamiliar tribe. Known only as “Nameless” in the village, he embraced his true identity upon joining the Perseus crew’s voyage to Treasure Island. Inheriting his mother’s photographic memory, he retrieved precise childhood recollections—submerged petrification victims, revival fluid formulas—proving indispensable in rescuing allies and advancing Senku’s scientific strategies. Arrival on Treasure Island unraveled his shrouded past: recognizing his birthplace, he guided the Kingdom of Science through the Petrification Kingdom’s terrain and deciphered its history. Clashes with Ibara exposed his lineage and his father’s shattered statue, fueling his resolve to claim leadership after Ibara’s fall. Post-victory, Soyuz remained on the island, reviving its petrified populace and reconstructing society. Delegating his role in the Kingdom of Science to Kirisame, he balanced alliances while governing with his father’s compassionate wisdom, prioritizing unity. In subsequent missions, his insights aided global countermeasures against the Why-Man threat. Endearingly shy around women—flustered by Amaryllis’s wit and Kohaku’s intensity—he nonetheless forged steadfast bonds within the Kingdom of Science, his loyalty and skill cementing their trust. His evolution from a nameless orphan to a leader bridging Ishigami and Petrification legacies epitomized a journey of self-discovery, resilience, and legacy reclaimed.