Nymora is a demon and together with her sister Avaryss they make the deadly duo Twin Furies. During the God Wars, she and her sisters hunted and killed those who broke their oaths with Zamorak. After Zamorak returned, they led a pack of hellhounds to hunt down the remaining Dragon Riders loyal to Zaros, eventually finding Morvannon and tearing her apart, even though she had changed sides. Satisfied with their work, they continued their services to Zamorak, although they would eventually learn many years later that Morvannon may have had an egg, since they all knew and expected the Illujanka to be infertile.