|Percy the Small Engine|
|Class: GWR Avonside 0-4-0ST|
|Designer: Avonside Engine Company|
|Builder: Avonside Engine Company|
|Top Speed: 35 mph|
|Built: Around 1900|
|Arrived on Sodor: Sometime between 1925 and 1935|
|Voiced by: Michael Cera|
Percy is a cheeky green saddletank engine who is best friends with Thomas. Percy is often seen pulling the Sodor Mail train.
Percy is the No. 6 green engine. He is the junior member of Sir Topham Hatt's railway. Percy is Thomas' best friend and his favorite job is delivering the mail. He is always happy to help and other engines sometimes take advantage of his good nature.