@GTX1080Ti Looking at the father, I'd guess he would prefer his daughter marrying a capable fighting man, not some dandy nobleman who couldn't even defeat a poodle but who has slept with who knows how many women already. Haru might be young, but if he's otherwise acceptable, he might gain Karen's old man's approval.
Haru, as far as the stories goes, is actually the best knight in his generation. In fact, he probably on the same level as Karen.
...that's if he decided not to be lazy and play around with Karen 😅