Lady was chased and wrecked by Diesel 10 long ago and was brought to safety by Burnett Stone. She was brought back to life with the help of Burnett's granddaughter Lily after being stored at Muffle Mountain for years, and helped Thomas defeat Diesel 10.
Later in Calling All Engines!, she and Rusty appeared in a dream to Thomas. Lady told Thomas how to resolve the problems Sodor was facing.
- Lady met Winnie the Pooh and his friends in Pooh's Adventures of Thomas and the Magic Railroad.
- Lady will meet Ash Ketchum and his friends in Ash's Adventures of Thomas and the Magic Railroad.
- Lady met Sora and Pals on Sora's Adventures of Thomas and The Magic Railroad.
- Lady is also best friends with Twinkleshine.
- Lady is a girlfriend of Thomas.