Bill & Ben

Bill & Ben are the most mischievous little engines in Thomas the Tank Engine & Friends. They are very cheecky, naughty, troublesome, mischievous, and always play tricks on the other engines. However, their behaviors always get them into a lot of trouble. Despite their mischievous behaviors, they always learn from their mistakes, and to do the right thing, and always act as heroes.

Bill & Ben are based off of a Bagnall 0-4-0STs "Alfred" and "Judy" of Par, Cornwall, who are both preserved and in working order at the Bodmin and Wenford Railway.