Arya is still praying for GREGOR's death but he is dead now; I'm pretty sure of it. His head is on its way to Dorne. She is hanging out with the Faceless Men of Braavos. She is expected not only to serve (valar dohaeris means all men must serve), but to give her entire being over to service. No playing with swords or otherwise being Arya Stark is to be allowed. So she goes for a walk and naturally strips all her clothes off and throws everything into the river. Except for Needle, which she hides under a stone step. Then she gets accepted as a full member of the temple. And sent off to go and work for a Fishmonger called Brusco to learn better to speak Braavosi.
As usual there is some mystery about just how much the Faceless Men are magical and how much they are tricksters. But it's basically a cult about freedom from slavery by dying, which doesn't sound particularly healthy. Then again the people who come to the temple to die seem pretty peaceful and happy about it, which is better than dying in agony from festering wounds but also slightly suspicious.
The other main message from this chapter is that we really should feel sad for Arya, who has lost everything and seems to have no place in the world, to the extent that she's fallen in with a sinister death cult. I'm pretty sure she's going to come out of this even more badass than she already is, though. Maybe she'll team up with Dany and together they will conquer all of Westeros.
