Annie Sawyer Season 1

Anna Clare Sawyer (Lenora Crichlow), known commonly as "Annie", is a ghost, appearing as she did at the time of her death in her early twenties. Up until her death, she had been living with her fiancé Owen (whom she later revealed had been her third serious relationship, her previous two having ended when her first boyfriend posted naked pictures of her on the Internet and when her second boyfriend drunkenly invited her mother to form a threesome). Following her death, she haunted the house which she and Owen had lived in while she was alive, and which Owen was now running as landlord (eventually renting it out to George and Mitchell).

Annie's ability to be seen and heard by normal people depends on her state of mind, although supernatural creatures can always see her. Annie appears in the clothes she was wearing when she died, which change subtly depending on her mood.[3] She is capable of teleporting herself short distances. For promotional purposes, Annie's condition as a ghost is highlighted in the show's publicity photos with the addition of a glowing aura and a degree of transparency: as seen in the show itself, she has no such additions, appearing just as corporeal as the other characters around her.) When first introduced, Annie was a notably insecure ghost, unwilling to leave the house. Overjoyed to be living with people who could actually see her, she tended to mother Mitchell and George (infuriating George by continually making tea). The reason for her remaining as a ghost was initially unclear, and she spent a lot of her time alternating between finding occupations for her time and emotions or explanations for any "unfinished business" which might be causing her to stay.

Initially, the cause of Annie's death was supposedly that she "fell awkwardly" down the stairs. It was later revealed that she had been blocking out her memories of the fact that Owen had been abusive towards her, and that he himself had killed her after finding thong underwear in her possession. Confronting her and accusing her of infidelity, as an excuse for tormenting her, he had pushed her down the stairs to her death and had flushed the thong down the toilet. (It would stick in the plumbing, eventually causing the rattling in the pipes which led to Annie's regaining of her memories). When Annie discovers her cause of death, she becomes a poltergeist, which allows her to move objects without touching them and turn machines on. At first, it seems that she can't control these newly found abilities, which only activate in times of extreme emotional distress (along with her teleportation).

In Series 1 Episode 5, the Door to Death appears for Annie once she has resolved the issue that was keeping her on earth — her murder. But before she can pass through the Door, Mitchell is stabbed, and she decides to stay to help him. Because of this, she missed her chance to leave and has to stay on earth in her undead state. She can now hear dead people, teleport further distances, and has greater powers of telekinesis, which she describes as "a whole new skill set."