The villa dynamics are very much like a US high school drama.
You have Meg and Helena as the airhead cheerleaders along with their jock boyfriends who are viewed as the 'in group', and who appear not to be overly interested in the others aside from watching their dramas unfolding and basking in their own perceived brilliance.
You then have Shakira and Toni who are the indie, quirky girls. They are in many ways just as attractive and intriguing to the popular boys as the cheerleaders, but they're less passive and more feisty, and don't just sit there looking pretty, which makes them too much of a challenge. These girls can sense that they are not welcome by the in group and perceive that as them being seen by them as lesser, and so are likely to develop a bit of a defensive attitude with them. They are also smarter than the cheerleaders, and so may have a tendency to sneer at them a little, especially when the cheerleaders clearly consider themselves to be the most attractive and the coolest.
You then have pretty much everyone else. People who don't see themselves as superior, people who are smarter than the incrowd, and who are generally more decent people. They can sometimes be swept along by the in crowds own hype about themselves, but also admire the indie girls for their sass and spunk.
Megan coming back is going to be interesting, since she is more of the cheerleader type, whilst Conor is definitely not one of the jocks. This could rock the boat a little, especially given the strong friendship between Conor and Shakira.