Since being revealed as the original "A", Mona (Janel Parrish) has developed into one of the most interesting characters on Pretty Little Liars. Brilliant, sadistic, lonely, and even helpful — it's impossible to tell whose side she's really on, or what she really wants from the Liars.

Now that Ali is back in the picture and we know Ezra might be "A", we can't wait to see how Mona will play into those two plots during Season 4B. Fortunately, although the Pretty Little Liars writers know how to keep a secret even better than Mona herself, they have dropped some hints about what to expect when the show returns on on January 7, 2013.

We've gathered the juiciest Mona related spoilers right here for your reading pleasure.

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Her connection to Ezra. One burning question on every Pretty Little Liars fan's mind is what Mona's connection to Ezra is. If Ezra really is "A", does that mean he and "A" numero uno are in cahoots? Well, we'll have a chance to find out more quickly, because in the winter premiere Ezra and Mona will share a scene that should reveal more about what's going on between them. We can get a taste of what that dynamic will be like in this sneak peek.

Important Ali scene. As for Ali, we know she and Mona share at least one "epic" scene that's full of answers, though whether it's a present-day moment or a flashback remains unclear.

Mona and Hanna. Mona and Hanna's friends-turned-enemies-turned-frenemies relationship is one of our favorite things about Pretty Little Liars (and that's saying something!), so we're happy to see that the complex tension between these two former besties is still running high in the winter premiere.

Is she good? In the Season 4 summer season Mona did her darndest to prove that she's on the Liars' sides, even turning herself in for Wilden's murder in an attempt to free Hanna's mom. But is she really reformed? The summer finale threw that into question, and producer Oliver Goldstick warns fans that they should remember what Mona is capable of. The good news in this department is that we will find out exactly what went down between Mona and Shana in that secret meeting of theirs. Hopefully that will shed some more light on Mona's plans.

She gets a love interest! Good or bad, everyone manages to find love in Rosewood, and this season we can expect to see Mona have a shocking love interest.

What do you want to see from Mona in Season 4B? Sound off in the comments below!

Catch the Pretty Little Liars Season 4 winter premiere on Tuesday, January 7, 2013 at 8 p.m. ET on ABC Family.

Rebecca Martin is an Associate Editor at Wetpaint Entertainment and our resident Game of Thrones, Breaking Bad, and genre TV expert. Follow her on Twitter and Google+!