Gilgamesh, the self-proclaimed King of Heroes, emerges from the ancient city-state of Uruk as a demigod born to mortal king Lugalbanda and goddess Rimat-Ninsun. His legend, humanity’s oldest heroic myth, is etched into the *Epic of Gilgamesh*, forming the bedrock of global folklore. Gifted with divine might and the clairvoyance Sha Naqba Imuru, he perceives timelines across past, present, and future with unerring clarity. His early rule as a despotic monarch incited the gods to craft Enkidu, a wild counterpart forged from clay, to confront him. Their fierce duel forged an unshakeable camaraderie, driving them to slay the guardian Humbaba and defy heaven by felling the celestial Bull of Heaven. Enkidu’s divinely ordained death shattered Gilgamesh, propelling him on a futile pursuit of immortality. This journey culminated in his acceptance of mortality, transforming him into a ruler devoted to his people’s stewardship. In *Fate/Grand Order - Absolute Demonic Front: Babylonia*, Gilgamesh manifests as Caster-class Servant, wielding foresight to prepare Uruk against the primordial goddess Tiamat’s onslaught. He erects fortifications like the North Wall, enlists allies including the mage Merlin, and devises a stratagem to lure Tiamat into the Underworld—sacrificing himself and Uruk’s populace to secure humanity’s future. This arc crystallizes his evolution from tyrant to self-sacrificing guardian. His Noble Phantasms epitomize his mythic stature. The Gate of Babylon unlocks every treasure conceived by humankind, wielding prototypes of armaments like Gáe Bolg and Excalibur. Enuma Elish, the Sword of Rupture, channels the primal force to sever creation itself. Combined with strategic genius, these render him an indomitable foe and leader. Arrogance tempers his sense of duty: he scorns the unworthy yet honors those like Ritsuka Fujimaru and Mash Kyrielight for their tenacity. Bonds with Enkidu and Hakuno (*Fate/Extra CCC*) unveil loyalty and vulnerability beneath his regal veneer. Though his methods are ruthless, his Chaotic Good alignment reflects a commitment to humanity’s ascendancy. Across narratives, Gilgamesh shifts roles—antagonist in *Fate/Zero* and *Fate/stay night*, reveling in chaos while disdaining modern frailty. Spin-offs like *Babylonia* and *Extra CCC* delve deeper, portraying a king who venerates worthy rivals and safeguards mankind’s legacy. His trajectory from godlike oppressor to civilization’s sentinel encapsulates the tension between mortal aspiration and divine burden.