Mary Cooper

Mary Cooper was born some time prior to 1947. She married Geraint Cooper, and the two would have a daughter, Gwen Cooper. Through her daughter Gwen, Mary would eventually become the mother-in-law of Rhys Williams and grandmother of Anwen Williams.

Biography
In her encounter with the quantum transducer, Gwen used the ghost machine to instigate a flashback of her and Rhys leaving to attend Mary's 60th birthday party. (TW: Ghost Machine)

At the time of her daughter's wedding she was living in Swansea. Mary attended Gwen's wedding. After seeing Gwen, who unbeknownst to Mary was actually impregnated by a Nostrovite, Mary was happy at the prospect of a grandchild - particularly because she believed it would shock Brenda. Although Mary was not privy to the nature of Gwen's job, she was caught up in the adventure when she was threatened by the Nostrovite who had assumed the guise of Brenda. Despite Gwen and Rhys proclaiming that they would not keep secrets from each other in their marriage, Mary's memories -like those of the other wedding guests - were erased by Jack Harkness. Mary forgot about the whole ordeal, which her daughter felt to be "for the best". She was last seen sleeping against Brenda - perhaps an indication that the two would manage to put aside their differences. (TW: Something Borrowed)

During the Dalek invasion of Earth, Gwen told Rhys tell Mary to take her pills and go to sleep. (DW: The Stolen Earth) When investigating a man connected to the 456 going by the alias "Timothy White"; Gwen commented that her mother used to shop there. (TW: Children of Earth: Day One)

At some point prior to Miracle Day, Gwen informed Mary of the true nature of her job. On Miracle Day, Mary accompanied her husband to the hospital after he had had a heart attack, and met her daughter, son in law, and - for the first time since Anwen was born - her grandaughter. (TW: The New World) After they have been released from police custody, Mary shared her home in Swansea with son-in-law Rhys and grandaughter Anwen. After Geraint was taken to Cowbridge Overflow Camp, Mary encouraged Gwen's rescue mission. (TW: The Categories of Life) Shortly afterwards, Mary was kidnapped, and used as leverage to force Gwen to turn in Jack Harkness. (TW: The Middle Men)

Personality
Gwen is seen to have a more frosty relationship with her mother, than she does with her father Geraint. At her daughter's wedding Mary was seen to be a somewhat snobbish, middle class woman. She enjoyed nagging her husband Geraint and scoring points against Rhys' Mum, Brenda Williams. (TW: Something Borrowed) After Mary meet's Gwen for the first time since her exile, she teases Gwen about her 'frugal' lifestyle, asking if she'd been feeding Anwen lard. (TW: The New World) Upon returning to Wales, and her mother, Gwen makes a joke about America's superiority in allowing people to divorce their mothers, evoking a sense of discord between the two. Mary likes to dress Anwen in a way that displeases Gwen, who sees the exclusively pink outfit as frivolous. (TW: The Categories of Life)