Why the Direwolves turned away when they saw Arya?
Because Arya is dead RIP! She got killed by this chick (aka the waif):
https://images.hellogiggles.com/uploa...42/thewaid.jpg
In one of the episodes when the waif (that chick) tries to kill Arya, the scene goes black and you see Arya walking out (like she won the fight). However, the waif stole Arya's face and made it look like the waif is the one who died.