|Occupation: Mail Engine|
|First Appearance: Troublesome Engines|
| Portrayer: Nigel Pilkington (UK)|
Christopher Ragland (US)
Percy is the junior member of the principal team of engines. He is a happy little chap who's normally quite happy puffing around the yard with no particular desire for adventure in the great world outside. He is always keen to oblige, a fact of which the other engines are apt to take advantage.