Paxton is a young, gentle Diesel who often works in or around the Blue Mountain Quarry and the Vicarstown Dieselworks. He is good-hearted and well meaning, but gullible, naive, and easily misled. He tends to be more of a follower than a leader and can sometimes find thinking for himself and making big decisions difficult. This may result in him being pressured into a situation he might not necessarily be comfortable with. However, if a friend is in trouble, Paxton will have the conscience and the self-assertion to do what he himself feels is right. As a result, the other steam engines find that he is likable and Paxton particularly looks up to Thomas at times. He also works alongside the narrow gauge engines frequently. However, Paxton can easily misjudge situations, misplace his trust in someone who might not have everyone's best interests at heart, and is a rather impressionable Diesel, but his good nature will ultimately show him for who really wants to be.
- Tigger refers to him as "Paxy boy", which Paxton loves that nickname very much.
- Paxton will make his first appearance in Thomas the Tank Engine in Fantasmic (Disneyland Version) where he, Cool McCool and Breezy will become part of the team at the end of the film.
- Paxton is the helper of Princess Cadance, Shining Armor and Flurry Heart.
- Paxton is best friends with Prince Blueblood.
- Paxton is the only diesel engine in 76859Thomas' Thomas' Adventures Team.