Heddwyn the Grumpy Welsh Engine

: “Why do work when a tiny green engine can do it for you?” 
: ― Heddwyn making fun of Percy
Heddwyn is a navy blue tank engine who works on the North Western Railway and is the railway's number 76 engine.
When he first came to the Island of Sodor, he was painted black and he worked as the station pilot at the Wharf.
=== Biography ===
Heddwyn started his life on the Island of Sodor as an energetic little tank engine who shunted trains for local engines, such as Edward and James. He enjoyed playing tricks on them, including James, "the fastest red engine on Sodor". He was taught a lesson when James tricked him to being told to take a train, but purposefully made him leave quickly to make him leave the train behind. When he realised he wasn't coupled, he was very cross. Soon he desired to pull his own freight train too. He got his chance when Edward became ill, and no one could pull the freight train. However, Heddwyn was so excited that he accidentally left his train and his passengers behind, believing he was pulling it easily. He soon realised his mistake and returned to pull the train. The engines laughed at him, though, and soon he wanted to get out of the wharf and see the world. Edward offered him a chance to pull trucks, and he excitedly took the job, not realising how troublesome trucks could be. The trucks pushed him down Gordon's Hill into a siding, where the Fat Controller told him to practice so that one day he would become as good as Edward. Heddwyn soon proved himself when he rescued Percy after an accident with the trucks, using the Breakdown Train. As a reward for his quick and heroic action, the Fat Controller made him a freight engine. Overtime, the engine got more and more matured. So that is why he isn't really as cocky as he was, but he is still pretty damn cocky.
=== Personality ===
Heddwyn is described as being a lazy and grumpy engine. He often gets into scrapes, usually by being too cocky.
=== Basis ===
Heddwyn is based on a London, Midland and Scottish Railway (LMS) Fowler 3F 0-6-0T. These class of engines were nicknamed Jinty, which comes from Scottish Gaelic. Heddwyn in particular is from the 1924 and 1925 batches (originally built as numbers 7100-7149, later renumbered 7260-7309 and then finally British Railways 47260-47309), which lacked the cutout in the side tanks.