Istredd is a well-respected sorcerer in the city of Aedd Gynvael with a keen interest in archaeology. As a young apprentice, he studied under Roedskilde. Yennefer works with him then and again. Spoiler warning: Significant plot details follow. He is one of Yennefer's long-time lovers whom she had known for many years, often visiting and staying with him for several months. During one such occasion during with Geralt had travelled to Aedd Gynvael with Yennefer the two men learned of each other. Both Istredd and Geralt are unwilling to share Yennefer, with Istredd not caring if Yennefer has several non-serious lovers, but refuses to share her with someone she is seriously involved with. During this time when Yennefer was with him he asked her to marry him and live together with him at his re