Marie

Marie is one of the main characters in the Mystery of the Eiffel Tower. Not long after Christina and Jean-Luc start sending letters to each other, Marie and Grant become pen pals. Eventually the two pairs meet each other and work together to find a statue that had been stolen from the Louvre Museum. Their clues lead them to multiple Paris locations, and the owners of the places call the police to keep an eye on them, and the kids lead the cops to the statue thief, a lady in black that seemed to be following them everywhere they had gone!