Meet Gwen Cooper

Gwen Cooper, played by Eve Myles, is a fictional character in Torchwood, a spin-off series from the long-running series Doctor Who. Gwen Cooper is a former police officer recruited into the Torchwood Institute by Captain Jack Harkness. Eve previously appeared as Gwyneth in the Doctor Who episode The Unquiet Dead (Russell T Davies has stated the two characters are not related).

Gwen Cooper was introduced in Everything Changes where she is seen working as a police constable in Cardiff. In the first scene of the pilot, Gwen is called in on a murder scene, only to encounter a mysterious team of individuals known only as "Torchwood". To satisfy her own curiosity (especially after witnessing the killing of a hospital porter by a Weevil), she tracks down the team and discovers the truth behind the organisation. Despite having her memory wiped by Jack Harkness, Gwen manages to leave a reminder to herself, linking a trace memory to the reconstructed murder weapon, and ends up exposing the murderer, Suzie Costello, Jack's second-in-command. When Suzie commits suicide, Jack offers Gwen a position with Torchwood and she accepts. Gwen fears that the team has lost touch with humanity because of their enforced secretive nature of working with aliens and alien technology for so long. She acts as the moral centre of the team, reminding them that they are in a position to help and protect humanity, not simply to recover alien technology.

Gwen lives with her boyfriend, Rhys Williams, who works as a transport manager. He believes any alleged alien interference with Earth over the past two years are actually mass hallucinations caused by terrorists putting psychotropic drugs in the water supply, a theory that when put to Jack by Gwen makes him deride her boyfriend as stupid. However, terrorists have been widley reported to be trying to poison water supplies so perhaps he's not so dense as the anti matter Jack believes him to be!