hello there, for a lot of time i thought to myself to give this idea of giving the NPCs a little more intelligence. for those NPCs that will be around the house, and a part of it, so when youre playing alone or with other players so they could walk around in your house, and be a part of your fuinction. sometimes being like bodyguards and defend the house and walk around, gust for the player to not feel alone. i think it can work very well, what do you think about it? have a nice day!
Currently, the people you place are just animated blocks. The quickest and simplest mini-fix would be to turn the guards into (slowly self-healing) turrets. But that is a band-aid.