The Keymaster

The Keymaster is a character in . Her real name is Mara.

She is Jack's antagonist and main target throughout the game.

Before she turned into Keymaster, Mara was a great scientist and also Adam's best friend. Different plans about future of Dharma split Mara and Adam. She planned to create the fusion of human and machine so humanity could finally leave the Dharma Tower. Adam didn't like that idea. It was too risky at this moment and also it would cost a lot of human lives. Mara decided to kill Adam so she could rule Dharma Tower by herself.