The Fat Controller brought him to Sodor when there was an engine strike due to a shortage of shunting engines. The bigger engines initially tried to bully him, but he soon showed that he was more than capable of standing up for himself. After a few years of shunting at the Big Station, the Fat Controller promoted him to goods traffic on Thomas' branch line. When not pulling trucks, he can be seen pulling the post train or even taking Annie and Clarabel when Thomas is busy. His best friends are Thomas and Toby.
He is reasonably experienced, but can still occasionally be a little naive and overconfident. In that sense, he is the perfect foil for Thomas – who can be just as headstrong.