Not exactly sure... All I've heard is that all NPCs in the area that move according to the RNG or they just randomly move advances the frame. Idk what an "area" is xD, but I'd assume that if you were outside in Solaceon Town, all the people outside would be NPCs. That doesn't necesarrily mean they move off of the RNG though. Sorry if that doesn't make sense. As long as you do frame callibration, you'll be good.