Shower thought: Lyanna = Arya + Sansa (Spoilers Extended) Lyanna is a willful girl (she is shown bullying Benjen in Bran's weirwood acid treep) who likes adventure (Knight of the laughing tree) and loves tourneys and songs (queen of love and beauty incident) and would have very likely been the kind of girl who is caught up in the exciting idea of eloping with her beautiful prince as though her life was like on the songs!

From everything we hear about Lyanna Stark, she could very much act the court lady PLUS be the willful warrior lady archetype.