Game of Thrones Season 6 Episode 03 Oathbreaker
Jaqen H’ghar offers “a girl” her sight back if she says her name. When Arya replies, “A girl has no name,” Jaqen offers her a drink from the poisonous well in the chamber and tells her if she is truly no one, she has nothing to fear. Arya drinks, closes her eyes for a few seconds and reopens them, her sight restored. When asked who she is a final time, she confidently replies “no one”.
JAQEN: If a girl tells me her name, I will give her eyes back.
ARYA: A girl has no name.
JAQEN: If a girl is truly no one, she has nothing to fear. Who are you?
ARYA: No one.