Lady Lysa Arryn, née Tully, is a recurring character in the first and fourth seasons. She is played by guest star Kate Dickie and debuted in "The Wolf and the Lion." Lysa was the Lady Regent of the Vale, ruling on behalf of her young son Robin Arryn. She doted on her son and pursued a policy of isolationism following her murder of her husband Jon Arryn, under the influence of Lord Petyr Baelish.