Responses
He might be better on the throne than Kiris, seeing how for all his bravado and lofty morals, he isn't doing anything to curb the nobles, and didn't hesitate to sell out Bel. If the silver-haired dude gained some more awareness, he might do a better job. Though I assume he isn't the male lead, so this won't be happening
Shipping her with the silver-haired dude? He might be the duke's family, but at least he has a good heart, and is very respectful and nice towards Bel. Also, an added advantage is that he doesn't have a history of selling her to a life of slavery...