Rosie is the shunting engine for both the Celgreb City Freight Yards and Coach Yards.
A bubbly and free-spirited tomgirl, Rosie is often busy shunting coaches or hauling freight around the two yards and the surrounding towns. Rosie is always down to do hard work and get her wheels messy. She looks up to Thomas as a role model, and is always glad to have him help out around the yards!
Rosie is based on an 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 ended, 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, one at the Bluebell Railway. Two S100s have also been bought from the former Yugoslavia and modified to USA condition.
Rosie is painted lavender with light grey tank panels, red lining and gold boiler bands. Her wheels are red with light grey wheel rims.