Billy is a Orange Tank engine!
Billy is a bright orange tank engine who can be impetuous, impatient, and impulsive. Although he is bubbling with enthusiasm and keen to get stuck in, he tends to act before he thinks things through, and can even end up keen to start one job before properly finishing another. He can be inattentive, does not always like being told what to do, and may try to work independently when, perhaps, he best not. He is often boisterous and tends to be overconfident in his abilities, thinking he need not listen to advice from more experienced engines. Nevertheless, his enthusiasm is well-meaning and, when he keeps calm, thinks things through, pays attention and follows instructions carefully, Billy can properly harness his energy and focus on what he is doing so that he can be a Really Useful Engine. If he ever gets snappy, his infectious get-up-and-go and burning desire to be useful will shine through and make it hard for any engine to really stay upset with him for very long.
Billy is based on a Manning Wardle L Class 0-6-0ST. Charlie is another member of this class.