Rosie is a tank engine who works as both a shunting engine and a mixed traffic engine on the Island of Sodor.
Rosie is based on a SR USA Class 0-6-0T. Originally classified as the USATC S100 Class and designed for shunting duties in Europe during the Second World War, after the war fifteen of these engines were sold to the Southern Railway where they were used as dockyard shunters at Southampton. There, they worked alongside the LB&SCR E2s (Thomas' class). Both classes were replaced by BR Class 07 diesels (Salty's class) in 1962, though members of the class remained in service on departmental duties until 1966.
Four members of this class are preserved. Two S100s have also been bought from the former Yugoslavia and modified to USA condition.
- Engine Unknown (cameo)
- Toad the Lucky Brake Van (cameo)
- The Road Rebel with Rollers (cameo)
- The Bridge of Caledonian Doom (cameo)
- Oliver's Tiny Tale (cameo)
- Steaming Sausage (cameo)
- Tank Engine Mixup (cameo)