Once you complete the Barracks, you can hire NPCs. You can have up to 8.... of course you do have to pay them. Also, you can recruit every "special" NPC in the game, and drop them at Caed Nua, then send them on those special adventures.
The thing that's most annoying to me about the hirelings is that if you're out in the middle of nowhere and someone's invading Caed Nua, even if you have 8 hirelings INCLUDING Korgrak the Ogre, auto-resolving the invasion always costs you money - so far as I've been able to determine, you never "win" at auto-resolve. And since you can't manual resolve if you're not AT Caed Nua - which believe me is a ROYAL PITA to accomplish if you're in the bowels of the Battery for instance - I find that particular setup fairly irritating.
Not those, I meant the poor farmers in Gilded Vale. They could've gone over and been my butlers or something.