Mary is the first of Junktown's many antique dealers encountered by Qwilleran in his investigation of Andrew Glanz' murder. She is also determined to conceal the truth of who she is, of her relationship with the victim, and of her relationship with in the Junktown community. Her embodiment of the book's central theme of truth versus illusion is perhaps the most complicated and vivid of all the characters and suspects in the book.