Billy is an orange tank engine with prominent buck teeth.
Billy is a bright, boisterous, and bubbly orange tank engine who thinks he can do it all. Nothing is too daunting or too challenging for Billy. He is bursting with enthusiasm, which may rattle a few rods, but never upsets any engine for long. 
When Billy first arrived on the railway, Thomas was asked by The Fat Controller to show Billy around. But Billy misconstrued Thomas' advice for bossiness and so refused to listen to him, causing Billy to fail to complete his deliveries. At last, Thomas lost patience and told Billy to do his own thing. Billy was delighted, but his happiness was short-lived as he swiftly ran out of coal and water. In future, Billy paid attention to advice and worked hard with every job he did.
Because of Billy's inexperience, he was disobedient and refused to listen to advice. After his mishap, he learned to listen to advice.
Billy is based on a Manning Wardle L Class 0-6-0ST. Charlie is another member of this class.
- To date Billy only appearance was in "Don't be Silly, Billy".
|North Western Railway|
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|Harvey • Emily • Fergus • Arthur • Murdoch • Molly • Neville • Rosie • Whiff • Billy • Stanley • Hank • Flora • Hiro • Victor • Charlie • Bash • Dash • Ferdinand • Scruff • Belle • Derek • Diesel 10 • Iron 'Arry • Iron Bert • Salty • Dennis • Den • Dart • Sidney • Paxton • Norman • Flynn • Winston • Stafford|