Rebecca, a yellow engine, comes from the Mainland. Rebecca is not afraid to stand up for herself and isn't intimidated by the older engines.
Rebecca is based on the Southern Railway "West Country" class, a class of 4-6-2 tender locomotive designed by Oliver Bulleid and built between 1945 to 1951. These engines were used as mixed-traffic locomotives, and were used for a wide variety of jobs. Ten members of the class have been preserved, with one of them even working on the Bluebell Railway.
Rebecca is painted yellow and navy with white lining. Her wheel rims are painted white, her front end is painted red and she has red and orange stripes painted along her sides. Rebecca also carries two blue nameplates with white writing, and the letters NWR written on her tender.