Dimitri

Dimitri, also known as Diesel 199 (in the Railway Series), nicknamed "Tunacan" and "Old Reliable", is a diesel engine who once visited the North Western Railway on trial and on loan from the Mainland.

Biography on YouTube
D199 first appeared on Sammy Clark's YouTube channel in the unboxing video of him, and his first appearance in the SC Shorts was in the episode, "Bash's Ghost" as a quick cameo appearance.

Biography in the SC Shorts
Dimitri was built Derby Works in 1963. In 2021, he came on trial to Sodor with another diesel engine, Class 40 (who had came to Sodor by accident). Dimitri soon made himself an enemy of the steam engines when he claimed that "steam engines spoil our image". Vulgar noises greeted this until the Logging Locos and Class 40 managed to shut up Dimitri.

The next day, Dimitri ironically failed with a train of freight cars at a signal box, blocking the crossing. Ferdinand, whose regulator had already jammed, came to help. However, after Class 40's ejector leaked, making him unable to pull his passenger train, Ferdinand was asked to help him as well. Ferdinand, with some help from Class 40, was still able to move and bravely pulled Dimitri, the freight train and the passengers to the next station. Sir Topham Hatt was not impressed, and Dimitri was soon sent home in disgrace for insulting the steam engines on the North Western Railway. However, his companion, Class 40, was given a second chance.

Personality
Dimitri was pompous, rude and sided with the general belief amongst diesels that steam engines are subpar to diesel power. He is blatantly arrogant and enjoys bad-mouthing the steam engines. However, he earned the nickname "Tunacan" by a signalman after he failed to pull a freight train, and he subsided when the signalman jokingly threatened to shove a tin opener up his magnet.

Dimitri thought he was more reliable than the steam engines. However, one day he broke down and quickly lost his nickname from "Old Reliable" to "Tunacan." In fact, everyone was rather pleased when he was sent away from Sodor back to the Mainland in disgrace.

Trivia

 * The reason behind Dimitri having a yellow face as opposed to a grey one was because one day during the summer, he stayed outside in the sun for more than twelve hours which caused his face to tan up and turn yellow.
 * Dimitri reuses Brewster's horn sound from Chuggington.