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 (also called the Red God or the Lord of Light) from the continent Essos 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, and has mysterious powers over fire and shadow. She is a prominent example of Martin's use of magic within the story, and is the source of several important prophecies that guide the narrative. (Wikipedia)