Lady the tank engine from Thomas & Friends

Lady is a tank engine who is painted purple with gold and has special magical powers. She holds the secret to the Magic Railroad. Lady traveled to the Island of Sodor and helped Thomas defeat Diesel 10.

Trivia

Lady's face only appears when she is on the Island of Sodor. She bears the resemblance to Gladstone a steam locomotive in the 1936 British Film called Oh, Mr. Porter!. She appears in Calling All Engines with her pal Thomas.