Ryan is a purple tank engine. He runs the Arlesburgh-Harwick Branch Line as a goods engine.
Ryan is based on the Great Northern Railway's Class N2. These locomotives were fitted with condensing apparatus because they were used for inter-city work in the Metropolitan areas of London and usually seen around Glasgow and Edinburgh in Scotland. One member of this class, No.1744 has been preserved and operates on the Great Central Railway in Leicestershire.
Ryan is painted purple with white and gold lining. He has the letters "GNR" painted on his tanks in gold. The number "1014" is painted on his bunker in the same colour.