Ok so after reading the theory by BigATheory, I'm convinced he is A. If you haven't read it, I suggest you do, because I think it's credible: http://pretty-little-liars.wikia.com/wiki/Thread:518306
Also, I found some more evidence it's him. I was on twitter yesterday and noticed this tweet by Marlene: 'Can it just b PLL time already?'
. Notice how she wrote 'b' instead of 'be'. You may think this is just a typo, but knowing Marlene, I highly doubt it is. She's really pedantic about everything and is always sneaking clues everywhere and I really think that by 'b', she means Byron.
And it kinda hit me today, but it seems obvious all along: He has a twin. It has been mentioned that Aria has an uncle with mental health issues and so perhaps it was Byron's twin. And it's a well known fact that mental illnesses are hereditory, and the chances of a twin getting a certain mental illness if one already has one is almost 50%. It seems likely that Byron might have some sort of mental illness too. This might explain why Eddie thought he recognised Aria - perhaps he saw a resemblence. If this isn't the case, then perhaps it is a case of a twin stealing another's identity just like the book.
And it seems that all the evidence is pointing to Aria now, and a lot of people think she is A. This is evidence itself that it is not her - It's just too obvious, and Marlene doesn't like obvious. She wants us to be in shock when A is finally revealed so I don't think it's her.
More evidence
Other notes about this episode
- As for Andrew. I think he is a red herring. Marlene is making us think that he was the one who fired arrows in the forest, with his trekking skills and his hate towards Ezra. I really think that this isn't the case and he was telling the truth about working on the yearbook. He's just there to throw us off. It's possible that he's A's helper though or Varjak. This would explain the way he phrased the things he'd say to Aria as if they had a hidden meaning. Or if Byron is A, he may have asked Andrew to watch over her because something big might be happening and he wants her to be safe. Which explains the dolls at the end of 5x24, if we're assuming the one on the castle was Aria.
-Kendra I think is related to Maya somehow
-Ali...I'm not sure about her. This one is hard. I don't think she killed Mona, but there's something about her I don't like. Like if she's released, she'd go back to the way she used to be. I think she used to be part of the A team. I think she's just some sort of psychopath. The way she just relentlessly slammed Hanna's hand without a care in the world makes me think she lacks empathy...basically a psychopath
I guess that's all I want to mention for now. Tell me what you think :)