Tethys, Greek Goddess and Titan was the daughter to Uranus and Gaea and the wife of Oceanus. She and Oceanus seemed to have a consistent love for each other, and she produced many children for him called Oceanids, which became smaller bodies of water such as streams, rivers, lakes, etc.
Due to the flooding that was caused by the reproduction of children between her and Oceanus, the two decided to separate for the good of the world.
She did not participate in the rebellion against Zeus. During the rebellion, Hera was brought to her by Rhea. She raised the future Olympian goddess. She and Hera seemed to have a decent relationship.