Thomas is the No. 1 blue engine. He is a cheeky little engine who often gets into scrapes, usually by being over-eager to do things best left to bigger and more sensible engines. But clouds never last long in Thomas' world and soon he’s bustling about again, playing his part in the yard and on his very own branch line. Thomas works hard and he always strives to be a Really Useful Engine.
Percy is the No. 6 green engine. He is the junior member of The Fat Controller’s railway. He is quite content puffing around the yard with no particular desire for adventure in the world outside. Percy is Thomas' best friend and his favourite job is delivering the mail. He is always happy to help and other engines sometimes take advantage of his good nature.
Gordon is the No. 4 blue engine who pulls the express. As the senior member of the engine family, he is the fastest and most powerful of The Fat Controller's team - and he knows it. He's goodhearted, always willing to forgive, and uses his superior strength to help smaller engines out of trouble.
Henry is the No. 3 green engine. He is a long and fast engine and has a thoroughbred look. Like all thoroughbreds, he tends to be a little high-strung and a bit of a worrier. But on any day he'll give any engine a run for its money.
James is the No. 5 red engine. He is a medium-sized engine whose six driving wheels are not as big as Gordon's but not as small as Thomas'. He has a fine scarlet coat and brass dome and thinks of himself as a Really Splendid Engine. Occasionally this leads to misguided ideas about the sort of work suitable for such a distinguished engine, invariably landing James in trouble.
Edward is the No. 2 blue engine. He is one of the older and wiser engines on The Fat Controller's railway. Edward is kind and a good friend to everyone. When the other engines misbehave, it's Edward that The Fat Controller turns to in order to calm everyone down and restore order.
Toby is the No. 7 brown tram engine. He’s square – old-fashioned both in looks and nature. Toby’s always happy to work and is usually found on the Quarry line with his faithful coach, Henrietta.
Emily is a beautiful emerald green engine with shiny paintwork and gleaming brass fittings. She can be a little bossy and think she knows best, but is always ready to help a friend. She is the newest member of the Steam Team.
The Fat Controller
The Fat Controller is the director of the Railway and is responsible for making sure the engines are always Right on Time and Really Useful. He has a firm but kind manner in dealing with the engines and staff, and has risen through the ranks from a railway engineer to his current position.