I think Arya had pig's blood stowed under her shirt and that's where the Waif stabbed her. She'll use the blood trail to lure the Waif to a dark room where she'll finally taker her on.
The blood bag plan is high risk. As pointed out by others, what if the Waif goes for the throat as an assassin should? Or the eyes? What if she employs poisoned darts instead? There's no way to anticipate the weapons or the bodily location of the strike. Something else is up with this.
ETA: How does the Waif take Jaqen's face in the following scene? How does the corpse have Jaqen and Arya's face? Do they all have doppelgangers or something?
[YT]06i9SyqB6B0[/YT]
Good questions, BestGirl!
I just re-watched ALL of the Braavos scenes from S05E01 to the present, and this is the one that's preoccupying me the most in trying to solve the mystery behind what's currently happening.
We now know that the Faceless Men
physically slice faces off of the bodies, it's not purely their weird sorcery, and these are the dead faces that they store in their great hall and use when they need a disguise. Yet we have this scene from the Season 5 finale involving faces from
living characters. Was that just a crazy hallucination (or vision ala Luke Skywalker in the Dagobah cave) as Arya went blind? Or illusionary magic? I sense that the key to this current situation may be in that scene somehow. Nobody is really who they appear to be because they are all "no one" now...?
So who was posing as "Arya"? Some people think it's Jaqen, but I don't like that idea or the rationale people use behind it.
Whatever the case may be
, Arya Stark is around somewhere! I do believe that there's more to Arya's recent scene than meets the eye because it's so incongruent with her previous appearance at her hideout. She's unarmed, and uncharacteristically careless and indiscreet.
In the preview for "No One", [BLACKOUT]the Waif's surpised expression indicates that she notices Arya (whom she thought dead) and then pursues her! Arya (if that's her) is leaping away like a superheroine and this is because: a) she was never stabbed and that was someone else, or b) she was miraculously and quickly healed. Maybe Lady Crane has some serious healing skills, or a magical potion-ex-machina!
<groan> [/BLACKOUT]
I just pray that they write her out of this predicament in a plausible, intelligent and satisfying way. I realize that's a tall order to D&D. We'll see!