Pretty Little Liars - Antagonist and Protagonist

In my opinion the protagonists in my story are four girls, Aria Montgomery, Hannah Marin, Spencer Hastings and Emily Fields. They are the protagonists because they are trying to figure out why was Alison DiLaurentis murdered and on the way they are figuring out many of her deep secrets that as best- friends she should have shared with them. They caught the person who murdered Alison but it seems as if that person was forced by a mysterious person to murder Alison. While they are getting threatening messages from an unknown person, they
also thought that they caught that person
but it seems as if there were more of them
and now after 3 years they started getting
the same threatening messages again.    













The antagonist of the story in my opinion is the mysterious person, so called "A", (that's how he signs
himself at the end of each message) who is sending them threatening messages and who is telling them to do things or else he kills someone or he tells someone a secret. "A" watches their every move and knows all of their deepest secrets. He/she is always their at their most embarrassing moments. He knows everything and it's actuatully "A" telling the story of what he has seen and heard.