How Tywin Took Lyanna with the Porcupine Knight VERY SHORT VERSION: Tywin wanted Aerys dead and Rhaegar as king. He tried using the Defiance of Duskendale to achieve this. It almost worked. Then Aerys took Jaime. Given his ruthless history, Tywin would do almost anything to destroy enemies. Getting others to take Lyanna and blame Rhaegar would start a war to depose Aerys while letting Tywin play both sides. ETA: Even if Lyanna had run away from her attackers (as Arya does) and was later fou