mona is a girl who was friends with hanna wen all of the other gurls lost touch with her... she used to be a nerd but now shes the 'it' gurl of rosewood. on the season finale the gurls went to her birthday party and snuck out to find hanna had found out who A was but then she had been hit oleh a car. everyone expects mona is A now because mona was mad at hanna wen she died but that may atau may not be true