Sentence:  The Arya subplot makes up for a lot, though. At first she's so aloof as to make you wonder whether there is any of the old Arya in there. She's sitting there with her old friend Hot Pie, gorging on freshly baked bread, and she's stuck in a terrible monotone. She barely answers his questions. She's a <WSD>ghost</WSD> of herself. And then Hot Pie gives us the key to Arya's whole thing this season so far: She didn't know that Jon had defeated the Boltons. 
Meaning of the word marked with <WSD> tags:  Any faint shadowy semblance; an unsubstantial image