Freya is one of the titan watchers. She resided in the Temple of Life in the Storm Peaks until Loken rebeled against the other watchers. She has since then been corrupted by Yogg-Saron. Freya left behind her avatar in Sholazar Basin to protect it from the Scourge.
Freya's name is derived from the Norse goddess Freyja (also sometimes called Freja, Freya).