Deucan

Deucan is a silver-feathered gyrfalcon, the son of the regent Strig and his mate Phila, the false king of Gyr, and the Usurper as foretold in the Te'pi. Raised on horrid tales of the Goddess's cruelty towards her subjects, Deucan grew up hating and fearing the Goddess and sought to destroy her, wiping her from the memory of every falcon, hawk, eagle and owl in the six kingdoms. Boras, after infiltrating the kingdom's inner political circle at the bidding of the Cult of Ieilae, plays on Deucan's fears and weaknesses, promising him the throne in return for the destruction of the old legends and the banishment of all things associated with the Goddess. Deucan agrees, and in the wake of his horrible decision blood and carnage follows, leading to the near destruction of the six kingdoms.

Personality
Deucan was a humble but troubled individual, raised on horrible stories of blood and carnage at the claws of the Goddess and her sons. Although he was respectful to his father and mother and felt honored to join the Guard, Deucan sought to undermine everything that Strig and Phila sought to protect after the king's death, including the old legends and the worship of the Goddess. After Boras effectively made Deucan king, he became cold, cruel and, near the end of his reign, insane. He began to dabble in the Omens, rejecting the Stream and bringing the kingdom of Gyr into darkness.