Lucy Stillman was a member of the modern day Assassin Order in the Assassin Creed series. As a genetic memory researcher for Abstergo Industries' Animus Project, she became a double agent for Abstergo after isolation from the order and her distrust for William Miles caused her to become disillusioned.
In Assassin's Creed, Lucy earns the trust of Desmond Miles in order to extract more information from him, but due to his worsening condition Warren Vidic plans an escape for the two. In Assassin's Creed II, Lucy helps Demond uncover the location of the Apple of Eden, while reporting all progress to Vidic. Upon discovery of the Apple in and Assassin's Creed: Brotherhood, Juno possessed Desmond and kills her.