The is the Titanide personification of light, sight, and observation. She is the wife to her Titan brother, Hyperion. Through him, she is the mother of Helios, Selene, and Eos.
We guess it is through her that her children have learned to luminate our world.
She fought on the side of the Titans during the war with the Olympians. When the Titans were defeated, she was locked away in the pits of Tartarus.