Peter Sam, named after the Skarloey Railway's previous controller, Mr Peter Sam and originally known as Stuart, after his builder, Kerr Stuart, is a narrow gauge saddle tank engine who lives and works on the Skarloey Railway.
There are roughly one-sh*t billion tropes so PLEASE look through them before adding one. Otherwise add what you like. ADDITION: PLEASE read through the trope description provided before submitting something. It's not a huge deal but too often people submit characters that don't fit just because they misinterpreted the title...