Arthur is a big maroon tank engine from The Island of Sodor.
Arthur is a big tank engine who has never been naughty in his life because he is quite a causious engine, because of this he has gained a "spotless record" and so he is responcible for some pretty important roles on Crotoonia's railway. He mainly shunts trucks and pulls goods trains. Arthur can be a bit naive however and after a jealous Thomas tricked Arthur into setting his standards too high with the trucks, his record did not stay as spotless as he had hoped. Arthur aims to please in his work and he enjoys the sea air and the smell of the fish.
Arthur is based on an LMS Ivatt Class 2MT tank engine developed for the London, Midland and Scottish Railway (hence the initials on his tanks). Unlike his basis, Arthur lacks a sand dome.
Arthur is painted in the LMS maroon livery with gold boiler bands and yellow lining. The letters "LMS" are written on his side tanks in yellow, shadowed by red. His wheels are also painted red and his cabsteps are painted black while the steps at his front buffer beam are red and he has white lamp irons.