Juno

Juno is a member of the First Civiliation. She is portrayed in a holographic form to Desmond Miles in a vault that was rumored to be bulit on top of the Temple of Juno. Juno further expands to Minerva's warning at the end of Assassin's Creed II. Once Desmond, Lucy, Shaun and Rebecca reach the apple that is located in that vault, Juno takes control of Desmond, forcing him to kill Lucy with his Hidden Blade.