Gaea is the Protogenos of the Earth and the Daughter of Chaos. She is the physical embodiment of the earth itself, and she has complete dominion over the ground. However, she is very rarely entirely awake as the earth is often stagnant. As such, she can only exercise a small portion of her powers at any time.
She is the wife of Ouranos, the sky, and she helped her children the titans overthrow him eons ago.