Lucy Stillman is the Animus operator who helps Desmond Miles in the first Assassin’s Creed.
Lucy works at Abstergo Industries, the modern-day organization that abducts Desmond and places him in the Animus. Although she is initially presented as an Abstergo employee, her actions show that she understands Desmond’s danger and quietly assists his escape from the facility.
The Animus is a machine that allows a user to relive genetic memories inherited through an ancestor. In the first game, Desmond experiences the life of Altaïr Ibn-La’Ahad, an Assassin active during the Third Crusade. Lucy’s technical knowledge makes the sessions possible and gives Desmond an ally inside Abstergo.
Players sometimes confuse Lucy with Rebecca Crane, who joins the modern-day team in later games, or with Shaun Hastings, the group’s historian and analyst. Warren Vidic is Lucy’s superior at Abstergo and is an antagonist, not Desmond’s helper.