When 你 answer the 问题 "Who are you?" with "No One" in 锦标 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 由 the waif time and time again.
The 20-year-old rising 星, 星级 discusses landing her first pro gig, the part of Sansa Stark, at 13, growing up in the public eye ("It can really get 你 down") and Sansa's season-six evolution ("She really showed people what she could do").