Referred to by other engines as "Devious Diesel", he believes that steamers are no match for diesels. Oily, scheming and ever ready to stir up trouble in the shed, Diesel's characteristic smirk is a sure sign that someone, somewhere is in for a bit of trouble. However, given a chance, Diesel wants to show that he's a Really Useful Engine too!
Diesel has shunted more wagons in one day than any other diesel!