Cia is a major antagonist and villain in Hyrule Warriors. In the version 1.3.0 update, she is also a playable Warrior. She is a powerful sorceress who wages war over the land of Hyrule in the aim to conquer it. She also harbors serious affections for Link, and desires to claim him as well.
In the original story, she was presumed dead before she was rescued from Phantom Ganon by Yu Narukami and Team Crusader.
In the Redux, however, Sectonia used her Stardust Breaker attack to dispel the darkness from Cia's soul. Cia decided to join the group as atonement for her deeds.