Fans of the hit HBO series have already seen Sansa Stark (played by Sophie Turner) come into conflict with her brother Jon Snow (Kit Harington) after she began to question his decision as King in the North.
And the power struggle between the pair could cause Brienne of Tarth (Gwendoline Christie) to turn her back on Jon due to her allegiance with Sansa.
The fierce warrior previously made an oath to Cately Stark (Michelle Fairley) that she would protect her daughters and it appears Brienne is keeping those promises.
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SKYGame of Thrones season 7: Brienne of Tarth's loyalties may mean bad things for Jon Snow
Brienne is incredibly loyal to that oath and incredibly loyal to Sansa
But her loyalties could come at a price to Jon as actress Gwendoline Christie who plays the fierce charactor told TV Guide: "Brienne is incredibly loyal to that oath and incredibly loyal to Sansa. I think there's something very interesting about the relationship between these two women and where it goes."