Daisy is a diesel railcar who came to work on the Ffarquhar Branch Line after Thomas crashed into the Stationmaster's house.

Daisy is a diesel railcar, who has been known to consider herself "highly sprung and right up to date". She was brought to help run passenger services on Thomas' Branch Line, while Thomas was "indisposed" after running into the stationmaster's house. She can be hard to please, mostly indignant, and highly opinionated. She is extremely authoritative, trustworthy, and confident in herself and can sometimes boast of her abilities in particular situations, unconcerned, despite having never actually been in such a position before. She will sometimes presume she can show other engines a thing or two, despite knowing little on the matter, until she actually learns for herself.

After arriving on Sodor, Daisy insisted that she required delicate handling and considered pulling freight cars to be below her. She was very lazy and stubborn, but Sir Topham Hatt spoke severely to her, telling her that his engines must work hard and that he sends lazy engines away. However, Sir Topham Hatt felt she deserved another chance after she worked hard clearing up after an accident Percy had. Daisy is now good friends with the other engines on Thomas' Branch Line, tries to work much harder to be a Really Useful Engine and is better capable of handling things alone. Daisy can be described as a self-obsessed diva and also vain about not wanting her interior be dirty one bit.

Your first lines will be in Episode 16: Branch Line Engines.