When u answer the vraag "Who are you?" with "No One" in badges for a long enough time, being No One takes on an identity of its own. In Arya's case it means trying and failing the same rigorous test door the waif time and time again.
The 20-year-old rising ster discusses landing her first pro gig, the part of Sansa Stark, at 13, growing up in the public eye ("It can really get u down") and Sansa's season-six evolution ("She really showed people what she could do").