|Mavis the Quarry Diesel|
|Occupation: Quarry diesel|
|First Appearance: Tramway Engines|
|Performer: Tersea Gallagher (UK/US)|
Mavis is a diesel quarry shunter.
Mavis is a feisty young diesel engine who works at the Ffarquhar Quarry and, with Toby's help, is learning to be a Really Useful Engine.