Well, basically it's Riza without the backstory of her father or details of Ishval and without that scene with Lust. It's clear that she cares deeply for Roy, but without the hints of codependence or obsession. And when he had his emotional crisis and went off to his emo hut at the start of the movie she let him stew up there, instead of something like chasing after him or codling him, but when he got over himself and came back to Central she was clearly glad to see him. I always thought they balanced each other well.