Arya Stark is Azor Ahai, here’s how:
“The Long Night is coming. Only the Prince that was promised can bring The Dawn.” - Melisandre 7x03
No matter how it seems, this never strictly states which gender the prophesised hero is. As Missandei corrects it as a Gender Neutral pronoun in High Valyrian. Meaning a princess can also be Azor Ahai.
Melisandre also says “Prophesies can be dangerous things.” as she once thought it was Stannis, and then she thought it was Jon.
Let’s now look at the Key Points in the Azor Ahai Legend.
Lightbringer (Sword of legend)
Nissa Nissa (The one he loved most)
Royal Blood (Prince/Princess)
Lightbringer was the sword forged from the blood of Nissa Nissa, the wife of Azor Ahai.
So what is Lightbringer in Arya’s case? Easy. The Valyrian Steel Dagger, Cat’s Paw. The Cat’s Paw Dagger may not have been aflame but it does have the blood of Arya’s most loved.
Nissa Nissa was the wife of Azor Ahai, and she had to die to forge Lightbringer which is the sword he used to end The Long Night.
We have just established that Cat’s Paw is Arya’s Lightbringer, but how does it have the blood of her loved one? Easy.
The Cat’s Paw Dagger was used in the attempt on Bran’s life back in Season 1. That issue caused the conflict between the Starks, Baratheons and Lannisters. The same conflict that shed the blood of Ned, Catelyn, Robb and Rickon. Who are? That’s right, Arya’s family.
A recurring theme in Arya’s arc is her “pack” her fierce loyalty and protective streak with her family. Which Arya herself said in 8x01
“I’m defending our family.” - Arya Stark
There is no one Arya loves more than her family and The Cat’s Paw Dagger caused the deaths of her family. That was her sacrifice.
This one is obvious so without getting into the complete Stark history Arya is a princess and always has been. Before Aegon The Conqueror came to Westeros the Starks were the monarchs of The North. They were known as ‘The Kings Of Winter’.
She is also the sister of a King, Robb Stark. The cousin of a Prince, Aegon Targaryen (Jon Snow) and the descendent of a King, Torrhen Stark. This makes Arya royalty.
So she is a Princess, the princess that was promised.
Now onto the final part, Arya’s Destiny.
“I see a darkness in you. And in that darkness, eyes staring back at me. Brown eyes, Green eyes, Blue eyes. Eyes you’ll shut forever.” - Melisandre 3x06/8x03
This, as of 8x03, we know to have come true. Arya kills The Night King, therefore shutting all of the “blue eyes” forever, as when you kill The Night King you kill all of the Wights and White Walkers along with him.
Also it’s funny how all of Arya’s training buddies (Syrio, Sandor and Jaqen) she always ended up striking them in the heart with her swords.
Anyway, as of 8x03 we also see how these characters (Beric, Sandor and Melisandre) were important to Arya’s Destiny. Beric was brought back so many times by The Lord Of Light because his purpose was to protect Arya, like he did in 8x03.
Melisandre didn’t know that it would be Arya that killed The Night King because she didn’t know about The Night King until season 6, she only saw Arya closing blue eyes. In that scene where she tells Daavos she’ll be dead before The Dawn is because Melisandre’s purpose, making Arya fulfill her Destiny, would be the purpose she was meant to fulfill.
Killing The Night King also required someone who knew Winterfell like the back of their hands, and who better than Arya Underfoot who used secret tunnels to escape her Septor all her childhood.
She used those tunnels to sneak up on The Night King, along with her training to keep her steps silent and managed to get the (literal) jump on him.
She was also handed The Cat’s Paw Dagger by Bran who held it up to Arya’s heart in front of the Weirwood Tree. Which was where the fatal blow was struck and where the final showdown took place.
Arya Stark is Azor Ahai. She ended The Long Night and brought The Dawn.
“Only the Princess That Was Promised can Bring The Dawn.”