Gwen Cooper is a fictional character from the television series Torchwood, which is a spin-off of the popular show Doctor Who. She is portrayed by actress Eve Myles and serves as a key member of the Torchwood team, known for her bravery and resourcefulness. Gwen starts as a police officer before joining the team, where she investigates extraterrestrial threats. Throughout the series, Gwen develops strong relationships with her colleagues, particularly with Jack Harkness, the team's leader. Her character often grapples with moral dilemmas and the emotional toll of their work, making her a relatable and complex figure in the narrative.