Wikipedia
Melisandre
Melisandre of Asshai is a fictional character in the A Song of Ice and Fire series of fantasy novels by American author George R. R. Martin, and its television adaptation Game of Thrones. She is a priestess of the god R'hllor and a close advisor to King Stannis Baratheon in his campaign to take the Iron Throne. She is often nicknamed The Red Woman due to the color of her hair and clothes.
Introduced in 1998's A Clash of Kings, Melisandre originates from the continent Essos and has come to Westeros to propagate her faith in the Red God. She subsequently appeared in Martin's A Storm of Swords (2000) and A Dance with Dragons (2011).
Melisandre is portrayed by Dutch actress Carice van Houten in the HBO television adaptation.