Buster is steamroller who goes about his job with pride and content, he works for the Sodor Construction Company.
Buster likes to think of himself as the "world's fastest steamroller" and often dreams of winning races. This came true when he won a race against Max and Monty on the newly completed Sodor Rally Track. He later helped out when Miss Jenny found mole hills on the football field. Buster was also seen at the new school construction site.