Shae

Shae is a character in Game of Thrones. She is played by Sibel Kekilli and debuts in the first season.

Shae is a young woman who has dreams of marrying into wealth and power, despite her low social status as a prostitute. She is not from Westeros, but refuses to divulge her true origins.

Baelor
Shae is a camp-follower whom Bronn finds attached to the Lannister army. He gives her to Tyrionas a present. Tyrion is charmed by her immediately. Tyrion attempts to learn more about Shae's past but finds it impenetrable. Apparently she was not low-born, her mother was not a whore as well and her parents are together. Shae instead deflects Tyrion's questions and learns about his own past, particularly the incident involving his marriage to Tysha.

In the books
In the Song of Ice and Fire novels, Shae is a camp-follower who attaches herself to a Lannister army and later comes into contact with Tyrion Lannister. She is young and attractive, with an interest in power. Unlike the TV series, Shae in the books is common-born, from Westeros and not particularly subtle or mysterious.