Your game reminds me of an old strategy game in wich you had to build barracks to attract heroes and then those heroes would patrol your kingdom. But as weird as it sounds for a strategy game you could not ask your units to attack a specific monster. Instead your only course of action regarding threats was to offer bounties to augment the chance your heroes would attack it on their own. Why does your game makes me think of that? Honnestly no idea. The MC is a lord/king in a medieval fantastic setting in both cases but that's about it.
Anyway a bounty hunters/adventurer guild could be an idea. Or just mercenaries, but i know people who despise mercenaries but love adventurers for some reason, so the name you give them could matter.
Spies/assassins could be an idea too, maybe available only to people with little to no respect points. In a an 'eye for an eye' type of idea. After all your brother did try to have you killed.
I've tried to treat my orc captives fairly, i don't know if i did everything good, probably not because i exploited them at some point to work things out with Charles. Maybe implement positive relationship with the orc kingdom at some point. Maybe you already had the idea though.
It is kind of good that the player is always in the dark as to if they did enought or not. It's good for immersion. But people playing VNs are kind of use to have very specific mission objectives so implementing an ingame walkthrough could be a bonus. Said bonus could be accessible only to those who are suscribers to your patreon and unlocked via a keycode if you so wishes.
Maybe add a tutorial type of thing at the beginning explaining that the decisions you make in order to keep your village afloat do have consequences.
Maybe specify a point past wich saving games will not allow you to continue the story in the next version. I had to start a new game because saves were not compatible between 0.5 and 0.8 no big deal of course, but players may appreciate that you make sure their saved game is safe in between versions.
Oh, and your game is cool as it is, i like it.