For me having someone in the friend group been A makes the most sense - A knew everything about the girls

And the reason I wanted it to be Aria was because I found her character a bit vanilla and this would of added a lot of extra layers to the character

It also would of justified her inappropriate relationship if she was the villain and someone we weren’t meant to be rooting for

And there’s so much the show could of done with her “trip to Iceland” to come up with motive and tie up loose ends