Question:  In George R. R. Martin's A song of Ice and Fire series who plays the only viewpoint character to appear in every published book of the series?
Sentence (from "Maisie Williams"): She made her professional acting debut as Arya Stark in the HBO fantasy television series "Game of Thrones" in 2011, for which she won the EWwy Award for Best Supporting Actress in a Drama, the Portal Award for Best Supporting Actress – Television and Best Young Actor, and the Saturn Award for Best Performance by a Younger Actor.
Relevant evidence: Yes