Mona Vanderwaal

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Mona Vanderwaal is a fictional character in the Pretty Little Liars book series, its television adaptation, and the spin-off TV series Pretty Little Liars: The Perfectionists. In the TV shows, she is portrayed by Janel Parrish. Introduced in Pretty Little Liars as Hanna Marin's best friend, Mona initially harbors a grudge against the protagonists, using her intelligence and resources to torment them anonymously as "A". In the third season of the TV series, Mona gains a partner who eventually takes control from her. Afterward, she forms an unstable alliance with the protagonists, becoming a victim of her own creation. Considered the most knowledgeable character in the series, Mona is versed in computer hacking, foreign languages, singing, empathy, and manipulation. Though introduced as a villainess, she eventually takes steps toward redemption. Mona is the first 'A' in the show and the book. Initially a supporting player, the TV character gained much popularity among viewers and critics...

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