For many years, Eris served as an assistant to Rezo, helping him research a cure for his blindness and perform miracles. Eventually she fell in love with him, but whether or not he returned her feelings is unknown. At some point during this time, she helped Rezo to create a clone of himself, called Copy Rezo. In the manga, Eris only appears in flashbacks, as the manga shows that Copy Rezo already killed her before the Slayers even arrived in Sairaag.