King Gilgamesh rose to prominence as a heroic prince who vanquished the demon Druaga and rescued the priestess Ki, ascending Uruk’s throne with divine-granted immortality. Over centuries, this eternal life warped his noble spirit into tyranny. Though his hair greyed, his body defied decay, surviving mortal wounds without falter.

Once a benevolent monarch, prolonged rule and grief over his son’s death and Ki’s anguish fractured his psyche, birthing "Shadow Gilgamesh"—a manifestation of his darkest impulses. The resurrected Tower of Druaga, now colossal, drew his obsession. During cyclical "Summers of Anu," he dispatched armies to conquer it, only to face repeated ruin.

His reign darkened: he purged histories of newer heroes, rebranded the tower in his name, and unleashed the Golden Knights to crush dissent. Desperate to reclaim the Blue Crystal Rod—an artifact central to his past glory—he clashed with successors like Jil, who challenged his crumbling legacy.

Across timelines and media, his tale unfolded. In *The Nightmare of Druaga*, three years post-victory, he confronted the sorceress Skulld after she abducted Ki. Defeated initially, he traversed time to secure the true Blue Crystal Rod, mending fractured realities. *Druaga Online: The Story of Aon* depicted a younger Gilgamesh aiding allies in a parallel realm, battling resurgent evils and reassembling relics to thwart Druaga’s resurgence.

His bond with Ki, once unshakable, frayed over eras. Though their lineage endured, their later years saw estrangement, with Ki vanishing mysteriously in certain timelines after clashes with foes. Yet despite his descent into despotism, Gilgamesh’s legend as Uruk’s foundational hero endured, shaping generations who sought to redeem or replicate his fractured legacy.