i think nymeria showed up to demonstrate that arya is well and truly no longer whoever she was. arya walked away from old arya, for better or worse, and nymeria turning its back on arya was meant to really demonstrate that a) innocence is over and b) there are costs to her choices that she hasnt even begun to comprehend.
and the more i consider it, the more i expect arya is not long for that world. she doesnt fit in anyplace. shes a profoundly damaged teenager with godlike power over life and death, thats maybe not a great energy on the chessboard at this point. oh and her sister, also a profoundly damaged teenager, is the queen of the north for the time being. gotta wonder how well those two are going to get on when sansa pulls rank on her.
and shout out to some good old GoT bedshitting...: sorry but dont all the sand snakes have poison on their knives and shit? because im pretty sure they cut euron greyjoy like half a dozen times, no? and hes doing great? oh and momma sandsnake spent an entire fight cowering behind her daughter?
if they end up handed over to cersei, (obviously this is the plan at bar), without poisoning themselves, thats going to be bedshittasaurus rex.
still loved this ep compared to the season opener but those sorts of inconsistencies are really taking the sting off this shit ending in 14 hours or whatever.
edit: quote from writers..;
“Arya’s not domesticated and it makes total sense her wolf wouldn’t be either. Once the wolf walks away, at first she’s heartbroken to have come this close. Then she realizes the wolf is doing exactly what she would do if she were that wolf.”
i mean, i get it, but its not entirely convincing to me that somehow, that whole scene was a self contained moment. its got to play out against the larger arya arc somehow, either priming us for arya possibly going insane or arya having a 'you cant walk through the same river twice' moment and lone-wolfing the fuck away from winterfell, possibly without even walking through the front door.