"A" is an anonymous character who sends threatening messages to Alison Di Laurentis, Aria Montgomery, Spencer Hastings, Hanna Marin, Emily Fields and, in some cases, Mona Vanderwaal.
The first and original "A" was revealed to be Mona Vanderwaal in "Unm Asked", who was the primary antagonist for the first two seasons.
After being discovered and a failed suicide attempt, she declares "game over".
Five years later, after Charlotte's murder, Uber A starts stalking and sending blackmailing texts to the four Liars in order to find out who killed Charlotte.
This new stalker, however, does not use the pseudonym of "-A", even if they are a copycat.
They also start using emoji's in their texts as a signature.
"A" makes appearances as a figure with black leather gloves, a black hood, dark pants, and dark shoes.
Throughout the seasons, the story focuses on the mystery of "A".
However, "A" has sported many different disguises, including the disguise of Red Coat, and The Black Widow.
However, Uber A also has many disguises, like: a gardener, a maid, a surgeon, etc.
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