Credit: Hulu

With all the excitement surrounding the big “A” reveal on last night’s Pretty Little Liars Season 2 finale (Season 2, Episode 25: “UnmAsked”), we nearly forgot about one of the biggest mysteries of the night: Who was the black swan?

As Spencer (Troian Bellisario) and Mona (Janel Parrish) browsed through “A”’s “lair,” Spencer came across some costume sketches for what was clearly an outfit for the masquerade ball that night. Then, we flashed to the ball itself, where a tall, brunette “size 2” girl was talking to Lucas (Brendan Robinson) and what appeared to be Jenna (Tammin Sursok).

Hanna’s (Ashley Benson) first impression was, “I hate her already.” Do we?

Since the black swan is somehow connected with Mona (and possibly her partner in crime), does that mean Lucas and Jenna are also part of “the A team”? And who do we know in Rosewood that is a tall, thin brunette? Aside from Spencer, Jenna, Melissa (Torrey DeVitto) sans pregnancy, and, well, Vivian Darkbloom?

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