I mean, it's not like we have seen much of Chloe, period
We have one scene where she speaks and it's mean girl bs, mostly to Victoria (and, by the way, I wonder what those rumors about her a few months ago were? It's never explored upon). After that is her mostly looking surprised/shocked - not a lot to go on. But Cosy has been pretty pedantic of setting up facial expressions and body language, I think he meant to convey she is thinking about stuff.
That said, I'm pretty sure she ain't joining the harem. There is a list floating around with all the Main LIs (those who will get collars), semi-main LIs (major role, but no collar) and side chicks and I think Chloe is in the third category. Granted, I'm pretty sure Annabelle wasn't in any of them or was in the last group initially, so, Cosy is not above promoting a fan favorite