It's become increasingly clear that the blonde in the red coat is a key member of the "A" team on Pretty Little Liars, and spoilers suggest we'll find out her identity this season.

That means PLL fans are abuzz with speculation about who the mysterious figure could be. To aid in the theorizing, we've gathered the most notable clues about the woman in red right here.

She appears to be in charge. The most important thing about this character is that she seems to be in charge of the "A" team. At the end of the Season 2 finale she came to Mona (Janel Parrish) in Radley, and Mona told her "I did everything you asked me to." Emily (Shay Mitchell) also remembers her being there the night she was drugged, and she seemed to be running the show. All of this matches up with Mona saying in Season 3, Episode 16 that there is someone else — someone else who's a woman — who calls the shots.

Vivian Darkbloom. The first time a red coat became significant was when we were introduced to "Vivian Darkbloom," Alison's (Sasha Pieterse) alter ego. When in full Vivan getup, Ali would wear a dark wig. But thay hasn't stopped many fans from thinking the woman in red might be Ali herself, sans wig.

The woman at the masquerade ball. A mysterious blonde in a red dress was spotted at the masquerade ball at the end of Season 2. Is this the same person as the woman in the red coat? Many fans think so.

She's wandering around Rosewood. Hanna spotted her during Episode 16, in Episode 20 Spencer (Troian Bellisario) saw her following her, and in Episode 21 Emily spotted and followed her, only to lose her and later find a creepy message in her car. It appears this person, whoever she is, gets around these days.

A network of helpers? Based on Episode 21, it would appear that the woman in red might have random helpers, like Toby's "friend" who mysteriously new Emily's name.

Clues from her hands. At the end of Season 3, Episode 17, we got a close look at the hands of the person wearing the red coat. Based on that we know she's the kind of person who might wear bright pink nail polish.

Did we miss something? Let us know in the comments below!