Serena was an assistant to Andy Davidson at South Wales Police. She was raped by Michael Hughes on an awayday and blamed herself for it, having been drunk.
The Meme encouraged Serena to kill Mike through one of its cards, leading her to push him in front of a bus. She covered her tracks on the CCTV but, after learning that there was another camera, hit the investigating Ng with her car and left her to die. She went to kill St John Colchester and met Yvonne Hartman, who told her that she was not to blame for her rape and should start a new life.
Serena got into her car to leave for a new life but found Ng inside. Wanting to keep the fact that she was an alien secret, Ng forced a gun into her hand and shot her, making it look like a suicide. (AUDIO: Tagged)