I reckon Luca is going to be unbearable during Casa. Pining, sulky and panicking.
I think the miserable pining ones will be:
Paige, Luca, Andrew, Ekin
The ones who get distracted by new people but still come back alone:
Tasha, Jacques (though i do wonder if he is smart enough to fight it for popularity), Dami, Indiyah, Gemma
Head properly turned:
Davide
Danica & Jay will obviously bring back new people