Assistant of George Sanderson, Charlie has blue skin and two octopus like arms, and also four tentacles that act as feet. He has snail eyes that pass through two holes in his workman's hat. He is also very friendly and admires Sulley and Mike's work, and states that George is like an older brother. Despite his friendly attitude, he'll often freak out and overreact when a certain object from a human child appears on George, following by him screaming "2319!", resulting in the CDA showing up in order to take control of the situation. Besides helping out in problems like this, Charlie also has an important role in the company, as assistant maintenance. During the movie, a weakened George gets another human sock stuck to his body, causing Charlie to scream "2319!" out again, though before he can finish speaking, a fed-up George starts choking him, takes off the sock, shoves it into Charlie's mouth, throwing him into a child's door and shutting it. Charlie somehow made it back to Monsters, Inc. afterwards, as he was among the employees that saw their CEO, Mr. Waternoose, get arrested by the CDA.
Charlie briefly appears at the end of the film. When Mike and Sulley are about to enter the Scare Floor on their first day as a Scare Team, various monsters are seen, including Charlie, who is seen talking to George.
- Charlie's surname is a reference to his voice actor, Phil Proctor.