I'm imagining a sort of desolate, somewhat steampunk like world, since humanity has sort of been forced to be resourceful, having rations delivered out slowly, trying somewhat to rebuild in the midst of a war. I was thinking that some wars are brought down to earth, so once in a while we can have so called 'alarms' where thehumans all hide to avoid the fight. Then maybe later on, we can have a fight take place near the compound forcing the demon to defend the town.

 My thoughts sort of bounce, so sorry if its confusing.