From A Wiki of Ice and Fire
The squinter is a secret servant of the Many-Faced God in the House of Black and White in Braavos and a Faceless Man.
A Feast of Crows
When he meets with the fat fellow, Umma has Arya Stark pour for them.
A Dance with Dragons
He comes to the meeting of the eleven priests of the Many-Faced God at the House of Black and White by secret ways, through tunnels and secret passages. He says about one of the men to receive the gift, "I will give this man the gift, I know him not."
- ↑ A Feast for Crows, Chapter 22, Arya II.
- ↑ A Dance with Dragons, Chapter 64, The Ugly Little Girl.