Creo was first seen working alongside Rohtul, Dominax, and Xamo, but the other three demons were vanquished by Paige and Billie. Creo agreed to work with Billie and Christy to help the Triad. He continued to help them, even after the Triad were thought dead. He did this as he had given a blood oath to protect the Triad's secret and serve them all the way. In fear of eternal punishment for breaking this oath, he requested another demon to kill him before the Charmed Ones' truth potion made him confess all about them and their plan. He was then vanquished when he and the other demon hit each other with Fireballs.