One of the beings whom Gilgamesh encounters on his quest for immortality is

There was Enkidu. He is a wild man who becomes Gilgamesh's best friend. After being visited by Shamhat, the prostitute, Enkidu is civilized and leaves the animal world behind to journey with Shamhat to Uruk. Enkidu accompanies Gilgamesh to defeat Humbaba before he passes away. Gilgamesh journeys to the Underworld to try to bring Enkidu back to life.