Paxton is a young green diesel, who works at Blue Mountain Quarry.
Paxton, nicknamed Pax, is a young, gentle diesel who likes the Steamies, especially Thomas. Sometimes other Diesels try to take advantage of him, as he can be a little gullible at times.
He has been known to work at Blue Mountain Quarry and was once involved in an accident there when Blondin Bridge collapsed. He was then sent to the Sodor Dieselworks for repairs.
Paxton later tried to help Luke rescue Thomas from falling off a cliff but Luke got a bit clumsy and made Paxton fall off the cliff instead and he was left underwater for a long time he sounded his horn for help ut no one could hear him and Paxton was left all alone. In the next part of Blue Mountain Mystery, Thomas and all his narrow gauge friends search for him when he was known for going missing until Thomas found him stuck underwater he went to fetch Rocky and together they pulled him out. Paxton can be clumsy at times.
- Keith Wickham (UK/US; Day of the Diesels only)
- Steven Kynman (UK/US; Blue Mountain Mystery onwards)
- Paxton is painted green with yellow lining.