for the dash: is your v a smoker before johnny gets in there? do they smoke after he's in there?
vi has always been a cigarette smoker, although she'd go through phases where she quit. usually for her output, or because she had some counterintelligence stuff. she is not much of a weed smoker, as she dislikes the smell and there are more efficient ways to get high.
virge's body is a temple . . . kind of. she did chew tobacco there for a little bit, and picks it up again with the stress of johnny being around. but she doesn't smoke, tobacco or otherwise.
veronika wasn't a cigarette smoker prior to johnny's entrance into her brainpan, though she did smoke weed. and vape. i know she and johnny have arguments about the vape pen. she smokes every now and again for him.