Robin is the most wholesome girl after Vic. Only reason for her being in second place is 1. Charlie is a vampire, which should make anyone cautious of her daughter and 2. Vic automatically wins for anyone who can feel sympathy.
More seriously, there is only the one episode where Robin freaks out because people are wondering if she humped Nika. Currently we have very little to go on. If she becomes a roommate, that means she'll be away from the vampire and we'll get to actually know her. I'm guessing that because Nika's set a goal to disrupt Charlie for Noji's sake (or amusement), we'll see a lot more of Robin.
Robin, Maja and Ayua are my favourites, even though I doubt I'll see as much screen time with them as with others. Ayua and Maja are almost certainly not LI's, and Robin was just in a supporting role from the start

But maybe Ocean will add Robin, I will hope.