I'm a massive Mona fan. She went above and beyond for the MC with that slap and story about how he was fucking her and Camila. Also, that wink she gives MC right after that.

She's so much fun and one of the best sides, in my opinion.
I hate that she's gone. I'm hoping that MC and Camila (or MC and Sage) go on a weekend to bring her back to school. Putting aside the fact that a road trip with either of those girls would be amazing, how cool would it be for Mona to see her buddies show up at her doorstep? That would be a fun scene.
If she does come back at all, I think it will be a little later. I also think it will be as a plot device to finally blow the lid off of Quinn's restaurant. Mona will have a lot of answers for anyone who wants to ask. Sage maybe? Mona also has ammo on Stephen Burke. Things would get really interesting.
However it happens, I just want her back and including in the story. She's a real sweetheart.