My most favorite character in the show of all time is Duck because he always likes working hard by taking things very seriously the Great Western way and talks endlessly about it to the other engines in order to keep the bigger ones out of trouble without any nonsense, but most fans of the show on social media have theorized that he is the most autistic engine on the railway. Not only does his name sound funny because he waddles along the track, but he had the best accident when he splashed into a flood on his branchline, which resulted in his firebox being put out and it turned out to be a funny and hilarious joke to James in Season 18. Even though, Duck was actually an engine and not an animal because his real name is really Montague.