Daisy is a diesel-railcar who works on the Harwick Branch-line with Ryan.
Daisy first arrived on Sodor when Thomas crashed into the Stationmaster's house and had to be sent away. She then had an incident with a bull later on, annoying Toby and Percy the Branch Line Engines even more than they already had. However, she received her comeuppance when Percy crashed into the breakvan and The Fat Controller deemed her "lazy", but gave her another chance. She has also had a number of arguments with George the Steamroller.