Rosie

Rosie is a light purple and grey engine with red wheels who came to the Island and idolises Thomas, whilst he's trying to deliver a special Birthday post train to Alice at Hill Farm. Thomas gets annoyed, as she continues to follow him. But after he has an accident and she helps him he starts to respect her. Her first appearance in the series was in the tenth season and made more appearances in the eleventh season.

Rosie is based on a USA class 0-6-0 "Dock Tank" engine.