Jessica DiLaurentis

Jessica DiLaurentis is the hidden secret antagonist from Pretty Little Liars. Known for her controlling ways, Jessica buried alive Alison, her daughter, after she thought Charlotte DiLaurentis had unknowingly killed her with a rock to the head. After that, she tried to frame Spencer Hastings for the murder. Although Alison was found to be alive, Jessica was soon murdered by an unknown assailant and buried in the Hastings backyard by villainous "A". According to the executive producer and main story writer of the show, I. Marlene King, Jessica is the true villain of the story.