Rosie is a cheery, bubbly tank engine. She was originally painted lavender, then she was repainted to red.
- 2007 (lavender livery, blue cab door and windows, smaller front cab windows)
- 2008 (even cab windows)
- 2011 (CG style face with blush and lip gloss)
- 2013 (updated face, longer magnet guards and curved edges, grey cab door and windows, smaller front cab windows, some variants without red front buffer beam, curved edges)
- 2018 (printed details on exposed wood, red livery, painted domes)
- Talking Railway Series Rosie
- Rosie and the Musical Caboose
- Early Engineers Rosie
- Easter Rosie
- "Battery-Powered" Rosie
- Roll and Whistle Rosie
- Rosie with flag banners from Rosie's Prize Pony
- The prototype 2007 Rosie had darker blue windows, slightly darker paint, and thicker side tanks.
- Despite originally having lip gloss and blush in the show, they were not featured until the 2011 Rosie.
- The prototype 2018 Rosie features lip gloss and blush. The final version lacks this.