Melisandre, often referred to as the Red Woman, was a Red Priestess in the religion of R'hllor, the Lord of Light, and had been a close counselor to Stannis Baratheon in his campaign to take the Iron Throne. Following Stannis Baratheon's death at the Battle of Winterfell, she revived Jon Snow after he was murdered by various members of the Night's Watch, believing him to be the Prince That Was Promised.