Solomon King is a pivotal character in Fate/Grand Order, serving as the final antagonist of the game's first story arc. Known as the legendary King Solomon from biblical lore, he is a powerful Caster-class servant. Solomon is revered for his wisdom and command over seventy-two demon gods, which he uses to shape the fate of humanity. His actions and decisions are central to the game's narrative, challenging players with profound moral and philosophical dilemmas.