Emily is a beautiful emerald engine with shiny dark green paintwork and gleaming brass fittings. She is the first girl engine on the Island of Sodor, and the only female member of the "Steam Team". Emily has large driving wheels and a shiny safety valve cover. She had been a kind-hearted engine since she first arrived on the island, but can be a little bossy and always think she knows best. However, Emily is always ready to help a friend.
Emily is based on a Stirling 4-2-2 single engine of the Great Northern Railway.