Who was the half mortal king of erech?

The half-mortal king of Erech is Gilgamesh, a central figure in ancient Mesopotamian mythology. He is described as two-thirds divine and one-third human, which grants him extraordinary strength and wisdom. Gilgamesh is best known for his epic adventures, including his quest for immortality and his friendship with Enkidu. His story is chronicled in the "Epic of Gilgamesh," one of the earliest known works of literature.