To answer your first question , I think Beric wished to die and stay dead . Being brought back to life so many times seems to have taken an enormous toll on him . He describes that his memories had faded away and he could no longer recall the location of his castle or the name of the person who knighted him . It is also possible that he was attempting to fulfill the Ghost of High Heart ' s prophecy where the Ghost mentions Catelyn coming back from the dead I dreamt of a roaring river and a woman that was a fish . Dead she drifted , with red tears on her cheeks , but when her eyes did open , oh , I woke from terror . Perhaps he felt compelled to help bring about this prophecy . Finally , it is possible that he recognized Catelyn and felt that it was his duty to help her as it was her husband that had originally charged him with capturing the Mountain and restoring peace in the Riverlands .