Gwen Elizabeth Cooper was a Cardiff Police Constable who was recruited by Gatekeeper for her noted work on 'unusual occurrences' or cases jokingly called X files. Gwen came to Gatekeeper from the UK, and Jack taught her the basics of firearm training. She and has learned much in her time there, though driving on the 'right' side of the road is still at times an issue. When Gatekeeper took Oberon prisoner, Gwen became involved with him and kept it hidden. When Oberon escaped and Gwen was nearly killed, she took a good hard look at her life. This introspection caused her to return to Cardiff for a time back to her previous position. With the new year, she thought it time to return to her team, she's missed them. Gwen has returned to Gatekeeper, and she's got some catching up to do.