Charles is dead, Aria is a killer.
Charlie is dead.
Somebody’s mad because Charlie is dead.
This person built the dollhouse.
In the dollhouse you see the memories of Charles when he was young, no pictures of him around the age of 12, only stuff of when he was younger than 6/7. If the A in the dollhouse would really be the boy in the video, than why is he so obsessed with his early years? To me it seems like somebody remembering Charlie. That's what makes me think that Charlie is dead and somebody who truly loved him is after the killer.
This 'A' person knows that the liars have something to do with the death of Charlie otherwise he/she wouldn’t be after them.
What if A put the liars in the dollhouse because he thinks one of them killed Charlie and he/she wants to find out who’s the killer. A made them play those games so the killer would reveal herself. He thought that she would come clean if she was ordered to hurt her friends. He didn’t really hurt the others because he didn’t want the innocent to be hurt.
This girl A’s after is probably Aria. She seems to have a personal disorder. I mean you have to admit that there are so many suspicious things about Aria. Like in the last episode, 6x03, she’s taking a picture of herself in the mirror. It isn’t the first time she’s standing like that in front of her mirror. I think it’s one of the biggest clues about her having an ilness.
I think Aria doesn’t remember what happened in the past, she doesn’t remember that it was her who killed Charlie. I think she has multiple personalities and that’s why A’s plan didn’t work out. In the last episode we see her looking into the mirror through the camera and looking at the doll, she looks like she’s remembering something vagualy, I think she has a split personality. There are some other theories that are telling something about Aria and a split personality, if you want more information about that, check them out:
- http://thepllgeist.tk/post/121848135208/pll-6x03-the-movie-hide-and-seek-parallels-to
- http://spencers-bleeding-purse.tumblr.com/post/121742923369/aria-6x03-songs-of-experience
I think the only reason for someone to be so focused on finding Charlie’s killer is because that person is closely related to him, like mother/father or brother/sister. I don’t think it could be a friend, because it happened ages ago and I think that somebody wouldn’t spend his/her life trying to find the killer of his/her childhood friend.
I think Aria might be seen as A or as Uber A. I think that at the end of the season they’ll either reveal Aria as ‘an A’ or they’ll reveal who set up the dollhouse.
Maybe they’ll find out in 6x10 the reason why ‘Dollhouse A’ made them live in the dollhouse, because one of them is a killer.