|First Appearance||Thomas Helps Out (Cameo)|
|Basis||No. 9369 "Musketeer", a Sentinel 100 HP BE Type steam engine built in 1946|
|Livery||Lime green with dark green stripes|
|Voice Actor|| mainlineengine2
Scruff and Whiff were friends on their old railway. However, their railway was going to close down. They were purchased by Sir Topham Hatt to work at the Sodor Garbage and Recycling Center. When Scruff first arrived on Sodor, he was teased for his odd shape and dirty appearance. However, when Henry bet him that he could not pull his baggage train, Scruff happily accepted the bet and pulled the baggage train and even arrived early at Knapford Station. Since then, all the engines have respected him, and any engine that has teased him for his dirty appearance has quickly been persuaded against it by the other engines.
Scruff is a friendly, enthusiastic engine. He enjoys working odd jobs and shunting at the waste dump. He does not mind getting dirty. Any engine that teases him about this, however, is quickly told against it by the other engines, since he is respected by all of them due to his strength.