Gwen Cooper

Gwen Elizabeth Cooper joined Torchwood when she got involved in investigating a case with the group which resulted in the death of team member Suzie Costello.

She had many adventures with the Torchwood team, including dealing with a machine that made her see a ghosts, a half processed cyberwoman, deadly fairies, cannibals, alien eyes, weevils and time travel. After Jack ran off to be with the doctor, she led the team, and got engaged to her boyfriend Rhys Williams.

When Jack returned, he re-took control, and the group continued to have adventures, and during this time, Gwen and Rhys got married and Rhys found out about Torchwood.

In children of earth, after the death of Toshiko Sato and Owen Harper, the three remaining members of the team, Jack, Ianto Jones and Gwen studied the mysterious messages sent by a group of aliens called 'the 456' named after the radio frequency these messages operated on. This group of aliens could somehow speak through the world's children and Torchwood searched the history of these strange aliens and took them down. After Ianto's death, a heartbroken Jack ran off to explore the universe.

By the events of miracle day Gwen has had a baby girl called Anwen and her and Rhys are living in a rural part of Wales when they are approached by CIA agent Rex Matherson. After the miracle, which made everyone on earth immortal, Gwen and Jack reunited to combat the miracle, and eventually defeat it.