Diesel

Diesel was bought by The Fat Controller, and, after a disagreement with Duck, was later returned for a full refund. In Ongoing Feuds, an episode where he is not seen but mentioned, Duck told Edward that Diesel had been raping and made the Fat Controller and all the engines think he was gay. As Duck was being rescued, the Fat Controller never believed in Diesel so he sent him a lovely present.

"He has very good manners. We are pleased to have him in our yard." - James, Gordon, and Henry - This quote was taken from Sir Topham Thing-a-Gummy's Agreement