Harvey is a tank engine with a crane mounted on top of his boiler, which makes him look rather unusual. He is involved in repair, recovery, and industrial jobs on the North Western 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...