Charlie is a tank engine who loves to tell jokes and have fun.
Charlie first arrived on Sodor to help out on the railway. He was said to be the favourite engine of the Mainland Engines. When Thomas was to show him around, Charlie convinced him to have fun instead of bringing Alicia Botti to the concert.
When Flynn was going on the roads for the first time, Charlie teased him by calling him a "big wobble on wheels". Later, in winter, Charlie pretended to be a talking snowman, which made Henry rather scared until Charlie realised that everyone has different opinions about snow.
Charlie is know primarily based in the Shunting Yards. He once came across an elephant on the line, but when he tried to inform the other engines, they just thought he was telling one of his jokes again. Charlie then reported the elephant to Harold who took Charlie seriously. Soon, the elephant was recaptured. Charlie was not pleased about not being taken seriously and vowed never to tell another joke. Unfortunately, Charlie's promise to himself didn't last long.
Caitlin left her coaches with Charlie in the Shunting Yards while she went to the Sodor Steamworks. Just then, Thomas arrived and left Annie and Clarabel. Later, while Caitlin came back to collect her coaches, Charlie, distracted by telling Caitlin a joke, accidentally shunted Annie and Clarabel with Caitlin's coaches, resulting in Caitlin pulling them with her train to Ulfstead Castle and the Mainland.