Skarloey, a narrow gauge saddletank engine, is the oldest engine on the Skarloey Railway. When Skarloey first appeared in the fourth season he had not worked in some time, but soon proved his worth once more. Since then, he has been a dedicated worker and a very wise engine. However, since the seventh season, Skarloey has acted like a very young engine and has tried to prove his bravery by getting hauled up the winch on the incline and by having a race with Rheneas and Freddie. He has also acted timid, being scared of an old wooden bridge, the wharf, and storms. This new personality isn't what you'd expect for an old wise engine.