Merlin, a character in Fate/Grand Order, is portrayed as a legendary mage and prophet, known for his wisdom and enigmatic nature. Originating from the Arthurian legends, he serves as a Caster-class servant. In the game, Merlin is a pivotal figure in the storyline, offering guidance and support to the protagonist. His character embodies a mix of charm, mystery, and a slightly mischievous personality. Merlin's abilities include powerful illusions and healing magic, making him a valuable ally in battles and a strategic asset in the Fate/Grand Order universe.