King Arthur was a legendary humani who was notable for pulling Excalibur from its stone. He also wielded its legendary twin, Clarent, which was later used by Mordred (Aurthur's son) to kill the King; this deed earned the blade's nickname of the "Coward's Blade". He was also one of the few humani to have a pure gold aura.
King Arthur was aid to be very close to Gilgamesh. Following Arthur's death, Gilgamesh's sanity began to suffer.
Scathach claimed to have played an instrumental role in his ascent to Kinghood, though she later regarded this as a mistake.
Cernunnos claimed to have killed both Arthur and Mordred