Petyr Baelish
Lysa Arryn, formerly of House Tully, is the second child and youngest daughter of Lord Hoster Tully. Enamored of Petyr Baelish, Lysa resented her older sister Catelyn Tully when he fell in love with her. Prior to the series, while Baelish was her father's ward, Lysa was impregnated by him after Catelyn spurned him. Learning of this, Hoster sent Baelish home and tricked Lysa into drinking an abortifacient potion, using her unborn child as proof of her fertility while marrying her off to Jon Arryn. Lysa has become a paranoid and an unstable, mercurial woman.