Scruff (Wooden)

He's a diesel. He works at the garbage dump.

He works with Whiff at the garbage dump. And, he's really stinky.

Percy (Wooden)

Percy is Thomas' best friend.

He pulls the mail car.

Den (Wooden)

He is Dart?s boss.

Den and Dart work for Diesel 10 and sometimes go to Misty Island. They almost burned down Thomas in Day of the Diesels.