A

"A" is the main antagonist of the series. "A" is an anonymous character who sends threatening messages to,Charlotte Matheson, Lilia Cason, and Payton Gilbert. The first and original "A" was revealed to be TBA in "TBA", who was the primary antagonist for the first two seasons.
 * -|TBA = Original Founder
 * -|TBA2 = Blackmailed by TBA