Gender: Female
Color: Black
Occupation: Quarry Diesel
First Appearance: Tramway Engines
Portrayer: Teresa Gallagher (UK/US)

Mavis is a feisty young diesel engine who works at the quarry. She is full of her own ideas and doesn't take kindly to advice! She has a lot to learn about trucks, but with Toby's help she is learning to be a Really Useful Engine.

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