We're About to Learn How Similar Arya REALLY Is to Her Dad on Game of Thrones

Arya has already confronted Sansa about her differing views on ruling Winterfell, accusing Sansa of trying to undermine Jon's authority and take over Winterfell. If she takes it at face value without questioning its origins or Littlefinger's motives, this letter could lead Arya to act against Sansa.