Mike Wazowski is a proud and confident monster, partly defined by his friendship with James P. Sullivan, whom he works with as his Scaring Assistant, and drives him through an exercise regimen like a strict coach. They’re best friends, roommates, incredibly devoted to each other, although Mike seeks to improve their careers, partly because of the hard work and everything they’ve ever put into their jobs. Sulley is a top scarer under his boss Henry J. Waternoose, who is the CEO of Monsters, Inc. Sulley’s best friend is Mike Wazowski. His mom is Mrs. Sullivan (who is not seen in the movie, but mentioned by Mike) and his dad is the famous scarer, Bill Sullivan. When he is first seen, Sulley is the top scarer at Monsters, Inc., responsible for generating the majority of scares that provide power for the city of Monstropolis.