Jack is a friendly and enthusiastic front loader who works for the Sodor Construction Company.

Oliver is a proud Great Western tank engine.

Splatter & Dodge (referred to as Splodge by Diesel 10) are twin diesel shunters under Diesel 10's command.

Skarloey is a red narrow gauge saddle tank engine and the namesake of the Skarloey Railway.

Sir Handel (formerly Falcon) is a blue narrow gauge saddle tank engine who works on the Skarloey railway.

Douglas is a twin mixed-traffic engine with Scottish origins. He is the twin of Donald.

Donald is a twin mixed-traffic engine with Scottish origins. He is the twin of Douglas.

Edward is a mixed-traffic engine with a blue and red livery. He works on the Island of Sodor and is the number 2 engine.