Belle is a British Railways Standard Class 4 Tank Engine.
Belle is Painted Royal Blue with Red and Brass fittings. She has the Number 6120 Painted in Gold and a crest Consisting of a flame, two dolphins, and a crown painted on her sides. Her Wheels are Red with Blue Rims.
- Season 13: Duck and the Quack Attack (cameo; not named), It's Good To Be Belle, Sideplates and Skirmishes (cameo) and How Gator Stole Christmas (cameo)
- Season 14: Millie's Castle Hassle (cameo), Quarry Quest (cameo), Hiro and the Heat Wave, Merlin the Magical Engine (cameo)
- Season 15: Roundhouse Roulette (does not speak), For Whom The Belle Tolls, Ice Ice Daisy (cameo), The Island of Misfits Engines (cameo).