Prince haut Slyke Giaja was a Cetagandan satrap governor, and half-brother to the haut Fletchir Giaja, Emperor of the Cetagandan Empire. He ruled over the planet Xi Ceta, which neighbored Marilac. Prince Slyke was one of the three primary candidates Lord Miles Vorkosigan had determined to most likely be the traitor who stole the Great Key of the Star Crèche during his time on Eta Ceta, along with the hauts Ilsum Kety and Este Rond. Following the events of Cetaganda, Prince Slyke was presumably not reappointed to a position of prominence.