Whiff is a tank engine who works at the waste dump.
Whiff is based on the North Eastern Railway's 2-2-4T No. 66 "Aerolite." Whiff is cheerful and optimistic. He enjoys his job of hauling waste around and to the waste dump. He doesn't seem to care what the other engines think about him, either that or he is oblivious to their opinions. Whiff is also a history buff, as he knows a lot about the Island of Sodor's history as well as various types of locomotives.