@THANATIA well it'll be great if he were to be a good guy, but another reason why i think he'll be kaguya's to be husband is bc he's from the enemy family of the kaguya family, so it's possible they'll use both of them to make peace between the groups, another thing is that since shirogane is so competitive he may feel a sense of inferiority towards the guy and think that it would be best for kaguya to be with himor something like that.
Then again this manga is the best at subverting my expectations so i honnestly have no idea how this will play out.