Thomas the Tank Engine Wiki
For other uses, see Percy (disambiguation).

“Percy perfect!”
― Percy's catchphrase

Percival,[1] or just Percy for short, is a little green saddle tank engine who lives and works on the Island of Sodor and is the North Western Railway's number 6 engine. His favourite job is pulling the Mail Train and he is Thomas' best friend.


Percy is a tank engine that lives on Sodor with Thomas and his friends. His best friends are Thomas, Diesel, Nia and Kana; the five share a roundhouse together called Tidmouth Sheds.


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. Percy also likes to ring his lucky bell to bring good luck to himself, or his friends in a bad situation.

Technical Details


Percy is an 0-4-0 saddle tank engine of a freelance design. Unlike real saddle tank engines, Percy's tank wraps around his whole boiler, rather than just the top half, an error carried over from C. Reginald Dalby's illustrations in early books of The Railway Series.


Percy is painted green with red lining on his saddle tank and yellow lining around his front windows. His number (6) is painted on the sides of his cab in yellow with a red outline. His running board, bufferbeams and valences are all red.

In the second series episode, Thomas for a Day, Percy was accidently splashed with blue paint.


Thomas & Friends: All Engines Go




Annual Stories

Magazine Stories


Video Games

Live Shows

Audio Files


First used Last used Sound Effect
Thomas Blasts Off Active

In the first series episode A Quiet Delivery and the game Magical Tracks, Percy is portrayed with a lower pitched version of his whistle.

First used Last used Sound Effect
A Quiet Delivery Magic Tracks


  • In an early version of the script for A Thomas Promise used for auditions in January 2020:
    • Percy is renamed Tom-Tom, in order to keep the series a secret.[2]
    • It is revealed that within the series, Percy is eight years old.
  • Percy has the second-most appearances of all of the characters, appearing in almost every main episode of the series.
  • Whenever Percy's lucky bell is brought up, Percy's vector would switch for a version with a bracket mounted on his coal bunker that connects his lucky bell to his body.
  • Percy has two different pitches of his whistle and can switch between them accordingly. He is currently the only character in the series able to do this.
  • Percy's favourite colour is green.[3]

See also