Toby was originally depicted as a wise, brave and kind old engine, often giving advice to younger engines like Thomas,Percy and Mavis. Due to his experience and wisdom Toby rarely ever had accidents or derailments, and almost never got into trouble with the Fat Controller. In recent seasons, Toby has been feeling more insecure with the world around him as he is an old engine, and is not on the same page as the younger engines, like Percy, who feel more rough and ready.