Varianor Abroad
Explorer
Perhaps, as prep, a short cheat sheet of personality for the NPC's? Say a sentence or two on how this character generally acts? Would that be a good idea or should I just let the players try to feel it out on their own?
If you're giving them NPCs? Yes. The more quick guidance you can give the PCs to acclimate them, the better.
One tip I forgot. Cut scenes with Participation Required often work better if you take a quick break just before the shift.