Rhea

Rhea is the Queen of the Titans and 'Mother of the Gods,' one of Ouranos's six adoptive children, wife of Kronos, and mother to six leaders of Olympus (Hestia, Demeter, Hera, Hades, Poseidon and Zeus). A descendant of the honor-bound Quirinale family, she wields mastery over the concept of 'Space'—the most powerful Quirinale to date, able even to locate the Abyss where the Black King resides.

Refusing to back either side of Theia and Oceanus's civil war, she was persuaded by Kronos to end it and then married him; their political union grew into genuine love. When Gaia's curse twisted Kronos into paranoid madness, she saved their son Zeus and raised him—though Zeus chose to kill his father rather than cure him.

Yearning for Kronos, Rhea eventually surrendered her godhood and reincarnated on Earth as Shin Le-ah, reuniting with Kronos's reincarnation; together they had twin sons, Cha Yeon-woo and Cha Jeong-woo, making her the protagonists' mother. Her leaking divine energy weakened her mortal body, and she left Earth in search of Jeong-woo, her death shaping Yeon-woo's path.