Neil is a dark green tank engine with an unusual box shape and a Scottish accent. He is a simple but kind engine, who befriended Skarloey when he was young.
Built at the Neilson and Company Works in Glasgow, Scotland in the 1856, for the Sodor and Mainland Railway. In 1865, Neil helped to ferry Skarloey from the port of Kirk Ronan to his home at the Skarloey Railway terminus of Crovan's Gate. He warned Skarloey about the trucks. Neil, along with Jared and Murph, run the Kirk Ronan Branch Line.