Dark Agnes de Chastillon (also known as Agnes de Chastillon, Dark Agnes, Agnes de la Fere and The Sword Woman) is a fictional character created by Robert E. Howard and the protagonist of three stories set in 16th Century France, which were not printed until a long time after the author's death. Like the later character Red Sonja, who was based on another Howard character, Red Sonya of Rogatino, Agnes has red hair and a short temper. But while Red Sonja's skill in the handling of swords is a divine gift, Agnes's skill is a mixture of innate talent and training.