OK after thinking a bit more about it, I have a prediction to add to
this. It's a bit long and has a lot of analysis, so I hope people don't mind I gave it it's own post. I think watching the show again, it's unlikely that Arya is knowingly working with Jaqen to draw the Waif out. But I do think Arya's test was not what we think it was. Please accept my latest tinfoil;
Jaqen was testing both Arya and The Waif here. Arya passed her test.
The assassination was not the real test. In fact the assassination was not a real job at all - because Lady Crane is a Faceless Man. She would have survived whether the poison was drunk or not, after all she had the antidote. Note Crane is by far and away the best actor in the troupe. Of course she is, the Faceless are the best actors in the world.
Jaqen says to Arya before the job that "A girl is not ready"; he knows fair well she's not ready to carry out proper FM assassinations. But why did he send her to kill a woman who just happened to be playing the role of Cersei Lannister, in a play about the events of her life? Coincidence? I think not.
When watching the show we see Arya's emotional response. Her last failure was failing to give up her revenge list, so
really what she must do to become no one is to give up her hatred, and need for revenge. What's important here is Arya's reaction to the play. Shortly after poisoning Lady Crane's drink, something odd happens - Lady Crane stops Arya and questions her. Four things happen -
- Lady Crane gives her a brief background story, nothing suspicious there, but this is also what the FM do when they play their "game".
- Arya responds to Lady Crane's portrayal of Cersei - this is where Arya really passes her test -
LC:"How would you change it?" Arya:"..The queen loves her son. More than anything. And he was taken from her before she could say goodbye. She wouldn't just.. cry; she would be angry. She would want to kill the person who did this to her."
She empathises with Cersei's loss. The effect the play had on her was not to further hate her enemies, but to understand how Cersei would feel when losing her son. She responded objectively - her judgement wasn't clouded by hatred. She even sounds like she's contrasting it with the loss of her own father. You can see the turning point in the previous scene - When "Joffrey" dies, Arya is laughing about it while the crowd throw her glances of disdain. The scene
is pretty funny, but obviously is intended to be tragic. When Lady Crane says her lines, however, Arya's face changes. She stops laughing. She understands Cersei's loss. When the scene ends, she is the first to clap.
The next two things are what personally clinched it for me; * Lady Crane asks Arya if she likes pretending to be other people. She seems confident when she says this, like she knows Arya is not what she seems. * Just before that though - she asks one, very important question of Arya;
LC: "What is your name?"
Lady Crane isn't just asking innocuous questions. She is playing The Game Of Faces. She starts with her own story, then ends with the same question Jaqen asks of Arya. Obviously Arya has no idea, so simply answers "Mercy".
Jaqen also tested The Waif here though - knowing Arya would fudge the actual assassination part, he wanted to see how The Waif reacted. She expressed a desire to dispatch Arya, and in this, she failed. A girl has no desires. When The Waif contronts him, Jaqen says "Shame. A girl had many gifts". He is disappointed in not Arya, but The Waif. Her eagerness to kill is at odds with what it means to truly be no one. His request to make it quick is not fondness for Arya - it is a warning - one the Waif has predictably ignored when she went for the gut, and not the heart or throat.
When Arya finally dispatches The Waif I think we'll see Jaqen appear. He will inform Arya she passed her test. She will then go out into the wider world - joining the mummers under her new mentor - Lady Crane.
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