Percy is a small green saddle tank engine who lives and works on the Island of Sodor and is the North Western Railway's number 6 engine. Percy normally pulls the mail train, which is his favorite job, and works alongside his friends. Percy is a tank engine that lives on Sodor with Thomas and his friends. His best friends are Thomas, Diesel, Nia, Kana, Carly, Sandy and Bruno. Percy is Thomas' best friend and quite a jokester. He has a lot of hidden courage in him, most of which he isn't aware of.