Burton Gus Guster is Shawn Spencer's best friend from childhood. He works at a pharmaceutical sales company but is easily swayed to help Shawn with their various cases. He puts up with a lot of Shawn's schemes and basically supports him in every way possible, including feeding, clothing and paying all of his bills. Shawn also routinely steals Gus' credit cards, and Gus lets that go too. He is terrified of dead bodies and screams a lot throughout the series, and has a hard time with relationships.