The young woman inside the cell looked around at the white walls, the white floor and the heavy, black steel door in front of where she sat on the chair with her hands handcuffed behind her back with her ankles shackled and chained to the floor where they had left her the night before after the training and the tests to see if she would manage to heal or get out by the following morning. The steel cut into her wrists but she didn't flinch from the pain as her eyes watched the door, narrow and deep red as freshly spilt blood. Her hair, as white as the blank walls around her lay over her shoulders and face in a soft veil that she peered through while she waited for the tell tale signs of a doctor at the door. The voices started first and even as they opened the door the girl pulled her hands from the cuffs and waited for the man to step within the threshold. 

'13. It's time to go hunting.'

Three years since the great escape that she had been invited to join and three years they had used sedatives to make her wait to hunt them down and test her strength against her own. They were just teenagers and Anastasia had been alive for hundreds of years as one of the very first batch of test subjects and the only survivor. The young woman stood, her curvaceous body covered in only a thin sheet of a white nightgown while blood dripped down her arms onto the floor, staining the pristine white with the bright crimson. They would have brought Zero or one of the others with them to keep her from outright killing all of them though Anastasia didn't care much at all for now as she tore her feet free of the chains and stepped toward the doctor who stepped out of her way while she walked awkwardly into the hallway. She was pale as the dead, though her heart didn't always beat and with her blood pressure she should surely be very dead by then. 

She was unkillable and that was it.