I won't say that Rose is whore. I don't know how her character will unfold yet, as I am only at the very beginning (I have finished the 9th quest). However, she seems more selfish. The Duke appeared to be more concerned about her people than herself when the peacekeepers haven't accepted her as heir. She seemed to care more about not becoming queen than about her land being ravaged by monsters, although I believe he is related to it. On the other hand, he seems to have no idea why this is happening. I can understand why she's only eighteen, but on the other hand, Baldwin the Leper became king at fifteen and won five wars with lesser forces despite being crippled. I guess it's because he wasn't a hero in an erotic RPG!
The way her character plays out, I wanted to see more political struggles between Rose and the Duke, with her always ending on her knees but gaining something in her agenda. I enjoyed how she persuaded the Duke to leave during Leto's award ceremony. I want to see more scenes like that in the future. However, I can't feel her inner struggle as much as I did with Celis, whom I didn't like. Maybe it's because I'm still early in the game.