Tethys

is one of the six Titanesses in the manga series Saint Seiya: Episode G. She was released from Zeus's prison in Tartarus by Pontos, along with her husband Current Okeanos and her brother Galaxy Kreios.

Plot
Tethys is the daughter of Gaia and Uranus and was imprisoned in Tartarus by Zeus in the mythological era after the Titans rebelled against the Olympians in the Titanomachy. Not much is known about her, as she never enters battle and seldom speaks. She eventually betrays Kronos, her youngest brother and King. Together with Okeanos and Mnemosyne, she becomes a follower of Gaia and Pontos.

Trivia

 * In classical mythology, was the Titaness of the Ocean, the sister/wife of Okeanos, and the mother of the 50 Oceanids (ocean nymphs) and of all the Rivers. She was also the guardian of the goddess Hera before her marriage to Zeus.