Mnemosyne

In the mythology of Ancient Greece, Mnemosyne was one of the first generation of Titans, a group of god-like primordial giants who were eventually supplanted by the Olympian pantheon.

Description
Sired by the master of the sky Uranus and Gaia, who represented Mother Earth, Mnemosyne was the goddess of memory, but is most notable for being the mother of the Muses, a group of goddesses responsible for providing mortals with divine inspiration. After coming to her in the guise of a human shepherd Zeus, the King of the Gods, coupled with Mnemosyne every night for nine nights, and thus the nine Muses were conceived.

Mnemosyne also kept a pool in the Underworld from which dead souls would drink in order to forget their previous lives prior to reincarnation.

What role, if any, Mnemosyne played in the decade-long war for the cosmos between the Titans and Olympians known as the Titanomachy is unknown.