<P> In "FrAmed", "Big A" is monotoring footage from Rosewood's Art Gallery when her ally, costumed as Red Coat, arrives at their lair . At the end of the episode, "Big A" places six syringes in the trunk of her car, while Red Coat hands her an envelope from the driver's seat . The item contains two tickets to Rosewood High's prom . </P> <P> During "Last Dance", "Big A" abducts Alison at her high school prom and takes her backstage to unmask herself . </P> <P> In the mid-season finale of the sixth season "Game Over, Charles", CeCe is revealed to be the mysterious antagonist that has tormented the Liars throughout their senior year . At the ending of the previous episode, CeCe (then unknown) abducts Alison and takes her to Radley Sanitarium, where she recounts her story to Ali . Meanwhile, the Liars assist through a live feed in a vault at the Carissimi Group . Drake reveals to have been born as a boy named Charles DiLaurentis, and when she was 7 years old, she gave Alison a bath, but accidentally dropped her in the scalding hot water . Ali was saved by Kenneth, but as a consequence Charles was admitted to Radley . According to CeCe, as a child she frequently asked her mother to purchase her dresses but Kenneth despised his son for being feminine, so he used the bathtub incident as an excuse to send him away . Despite feeling lonely while residing at Radley, Jessica paid a visit to Charles as often as she could, in an attempt to make him feel less alienated . </P> <P> When Charles was 12 years old, Bethany Young pushed Toby's mother Marion Cavanaugh off the roof of Radley, presumably to protect his femininity . However, Bethany double - crossed Charles and blamed him for Marion's homicide . The staff at Radley believed her accusations due to the fact that Charles was wearing a dress at the time and didn't want to be seen in it . Jessica paid off a young detective Wilden to make sure Mrs. Cavanaugh's death was ruled a suicide . Charles was diagnosed with intermittent explosive disorder (IED), though this was actually an accurate diagnosis for Bethany . For the subsequent 2 years he was heavily medicated with tranquilizers, but was let out to attend his symbolic fake funeral . After the funeral took place at Carol Ward's house, Jessica finally embraced Charles as her daughter . She allowed his return to Radley as a female, renamed Charlotte . </P>

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