Yvonne

Origin: Doctor Who
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Species: Human
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Occupation: Used to be with the Police
Residence: Poznanski Street 26 (15-98)
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Import Date: Year 6.

Yvonne was a colleague of Gwen Cooper's at the Cardiff police department. Gwen asked her to search for a Captain Jack Harkness on the police database. She told Gwen the only person with that name and title was an American who went missing in 1941. (TV: Everything Changes)
Gwen later visited Yvonne when she had lost all memory of the Torchwood Team. (PROSE: We All Go Through)