Gilgamesh

An Archer-class Servant. He appears familiar with Fuyuki City and has an overt but unrequited love for Saber. His true identity is Gilgamesh, the King of Heroes. He is initially known also as the Golden Archer. In the anime, he defeats both Caster and Kuzuki. Saber initially states that Gilgamesh defeated her as an explanation for why he is alive during the fifth Holy Grail War (Shirō also refers to him as the "eighth Servant"), but later clarifies that she and Kiritsugu Emiya had won the fourth Holy Grail War. It is later revealed that he was splashed with the mud of the Holy Grail back then, converting his body to one of flesh and blood and allowing him to survive without a source of mana.

Personality
He is arrogant, selfish, and enigmatic.

Magical Skills
Typically clad in an ornate golden armor, he possesses an immense number of Noble Phantasms so that not even Saber knows his identity. It is later revealed that they are the original copies of nearly all Noble Phantasms, stored in one of his own: Gate of Babylon: King's Treasure, a key-shaped sword that opens a portal to a mystical vault containing the Noble Phantasms. He can draw swords out individually for close combat, or fire them out of his gate like bullets. Incidentally, this method of attack made him suitable for the Archer class.

Only two of his Noble Phantasms, Enkidu: Chains of Heaven and Enuma Elish: The Star of Creation that Split Heaven and Earth, the attack generated by the weapon Ea: Sword of Rapture are representative of his true identity.

He is shown to be one of the strongest Servants, brushing aside Excalibur in the anime, and ending eleven of Berserker's lives consecutively in the Unlimited Blade Works route. It is said that if he ever manages to put aside his overwhelming pride and go all-out, nobody can defeat him.