Gemini Saga, born alongside twin brother Kanon, ascended as the Gemini Gold Saint, his fate intertwined with an ancient malevolence. In infancy, the spirit Lemure—dispatched by the goddess Ker—fused with his soul, fracturing his psyche into dual identities: one devoted to Athena, the other seized by darkness. This duality altered his appearance, his hair shifting between radiant blond and jet-black as each persona dominated. Renowned for compassion and intellect, he emerged as a candidate for Pope, yet the ascension of Sagittarius Aiolos ignited his latent corruption. Consumed by bitterness, he murdered Pope Shion, assuming his guise to rule the Sanctuary clandestinely for thirteen years. Under this facade, he schemed to assassinate the infant Athena, deploying a golden dagger gifted by Cronos—a plot foiled by Aiolos’ sacrifice. *Saint Seiya: Origins* delves into his fractured mind, revealing Shion’s fateful choice to spare Saga from Lemure’s destruction, enabling the spirit’s gradual domination. Tormented by internal warfare, his benevolent self intermittently surfaced, once driving him to seek death for atonement—only for Ker to thwart the act. During the Sanctuary Arc, his malevolent half commanded persecution of the Bronze Saints and manipulated Gold Saints like Cancer Deathmask and Capricorn Shura to secure authority. Defeated by the Bronze Saints, his demise briefly unveiled lingering remorse as his virtuous identity flickered through. *Saint Seiya: Episode G* explores his entanglement in the Titans’ resurgence. Cronos exploited his divided soul, weaponizing his instability against Sanctuary. Though Saga momentarily rebelled—confronting Cronos with his Galaxian Explosion—the darkness within persistently sabotaged his defiance, mirroring his eternal inner strife. Resurrected as a Specter in *Hades Chapter - Sanctuary*, he allied with Shion, Camus, and Shura under Hades’ banner. Ostensibly aiding the underworld’s invasion, their covert strategy aimed to alert Athena of an imminent peril, enduring Rhadamanthys’ scrutiny to deliver a clandestine message. This gambit enabled Athena’s sacrificial gambit to forge her divine armor, pivotal to Hades’ defeat—a narrative underscoring Saga’s redemptive undertones, his allegiance to Athena eclipsing past sins. *Next Dimension* flashbacks illuminate his youth, detailing Kanon’s efforts to lure him toward corruption and his exchanges with prior Gold Saints. These glimpses deepen the context of his psychological battles and the external forces molding his legacy. Across canon, Saga’s arc epitomizes the struggle between light and shadow, his choices weaving into broader themes of cyclical conflict, sacrificial duty, and the fragile boundary between inherent nobility and external corruption within the Saint Seiya cosmos.