gilgamesh (caster) (fate)
Gilgamesh as he appears as a Caster-class character in the Babylon chapter of Fate/Grand Order.
This version of Gil is taken from the end of his namesake epic, after a lengthy and ultimately fruitless journey in search of immortality. As a result, he is a much wiser man, and the much beloved king of Uruk, though he still keeps some of his trademark arrogance and he's fighting a war on three fronts by the time the player character comes in. He is also established to be a workaholic by this time.
This tag implicates gilgamesh_(fate) (learn more).