Trevor is a dark green traction engine that resides at the Wellsworth Vicarage Orchard. He is owned by the Vicar of Wellsworth. He was at the scrapyard, where they were planning on breaking him up, until Edward and the Vicar saved him.

Trevor is incredibly cheerful, kind and benevolent and gets along well with nearly everyone. He enjoys basking in the sunshine or dozing in his shed, but easily grows bored and unhappy if he does not have much company or enough work to do. Trevor is particularly fond of children and loves giving them rides whenever he gets the chance.