Lucy Stillman (1988 – ) is a member of the Assassin Order, and former genetic memory researcher for Abstergo Industries' Animus project. During her infiltration of Abstergo, she reported information on the company's recent activities to the Assassins. However, Lucy's time at Abstergo and her separation from the Assassin Order led to her changing her loyalties to the Templar cause between 2011 and 2012. When Desmond Miles was brought into Abstergo for testing, Warren Vidic instructed Lucy to earn Desmond's trust so the Templars could ultimately find the Piece of Eden and use it in their plans for world domination. As Desmond's condition began to worsen, Vidic ordered Lucy to take him somewhere he'd feel safe. Lucy carried out her orders, and would eventually relocate Desmond to a hideout to join her fellow Assassins Shaun Hastings and Rebecca Crane.

After a month, the team discovered the location of the Apple, which was inside the Colosseum. When Desmond touched the Apple, he was possessed by Juno, a member of the First Civilization. Knowing of Lucy's true allegiance, Juno forced Desmond to stab and kill Lucy. She was revived months later by ironicly Juno to which she and Desmond started a relationship.

Living with DesmondEdit

After being revived and caught up on the situations, Lucy and Desmond again started a relationship, in 2016, she saw strange lights in the sky, to which Desmond went into the Prototype Animus 4, to where he found that after death Ezio, his spirit left the world. Hours later, Ezio was at their door with a group of friends. After a few hours of talking, they made a fast friendship.