Who is Lady Cunneware from Parzival and what is their importance?

Lady Cunneware is one of the women in King Arthur's court. She vows that she will not laugh until she sees the man who is destined to win. Lady Cunneware laughs out loud the first time she sees Parzival, which causes Keie to strike her and Parzival to swear vengeance. She later marries King Clamide.