In Season 3, Episode 1 of Wynnona Earp, there are some vampires that conspicuously employ a pink fog. I can't quite figure out what the fog is for, though. It's not the vampires themselves in an incorporeal form as one might imagine from traditional vampire lore, since all the scenes suggest that the vampires are physically standing around in the fog. As a means of concealment, it's not all that great, since it's conspicuous and relies on the target walking into the fog. And it's evident that they're not constantly producing it, since we see them without it several times, so it's not something involuntary. They don't use it to control the minds of their victims, since they appear to need touch for that, and walking into the fog doesn't result in being glamored, yet it seems important to them to have it around in large quantities at the party where they plan to kill members of the original families, despite it not even being thick enough to obscure vision there.
So what purpose does the fog serve? Does it let them maintain their control once established in some sense? Do they just like the aesthetic?