Olivia Flaversham

Olivia Flaversham is a young 8-year-old heroine in The Great Mouse Detective. She is Mr. Flaversham's daughter. Her father was kidnapped by Fidget in the beginning of the movie. She went to look for Basil but got lost on her way.

During a comic that was set in the same year of 1897 but somewhat after the movie, she does mysteries too, with Fidget, who was reformed. She states that every times she visits Basil, she knows that something is up. When she went inside she heard about the Sideshow Sea Beast from Basil and Dawson. She keeps an open mind and called on Fidget and Toby to head on out to the carnival. On the way to see the beast, Fidget showed her how some tricks were done.