We saw Melisandre tell Arya:
"I see a darkness in you. And in that darkness, eyes staring back at me: brown eyes, blue eyes, green eyes. Eyes you’ll shut forever."
and sure Arya
killed Walder Frey (brown eyes) and the night king (blue eyes)
Did the writers include this only to raise theories such as Arya killing Cersei or Daenerys?
What is the plot about the green eyes?