|Catherine with Culdee|
|Position||Coach on the Culdee Fell Railway|
|Age||111 (as of 2011)|
Catherine is Culdee's loyal coach. She is based on the No. 4 coach of the Snowdon Mountain Railway built in 1900.
She and Culdee have built up a strong working relationship, so he will immediately know when anything is wrong. She is very safety-conscious and was upset by Lord Harry's risk-taking when she worked with him while Culdee was being repaired. She is coupled in front, like other Culdee Fell Railway rolling stock, so she is responsible for being a good look-out and warning Culdee about any dangers lying ahead of them.
Catherine is painted orange with cream coloured window surrounds and a black roof top. In the magazines, she has white coloured window surrounds, instead of cream.