It's not mentioned in the script at all, actually, even in the Japanese version, so it's understandable that you wouldn't get that impression from the game. The only place it was mentioned, even in Japan, was in the Foundation Guide, which never got released here. I did a lot of research about it a couple of years ago, and apparently Rosa and Cain were dating before he left to train as a dragoon, but she broke off the relationship shortly thereafter. I'm given to understand the breaking off of the relationship was a product as much of Cecil suddenly having more power in the kingdom than Cain as it was of Rosa being lonely; in any case, she took up with Cecil at about the same time she broke off the relationship with Cain. I haven't liked Rosa much since then.Originally posted by TheAbominatrix
I didnt see anything implied to that extent, maybe I'm just missing it. The way I see it, it's always been this sort of 'unrequited love' on Kain's part. But oh well..
There was a really old thread that had further details that even I can't remember, but it's undoubtedly been pruned by now.