Some Scary NPC (Nonviolent)

I’ve been looking around for a creepy NPC that simply runs near you, but not close. Maybe your screen gets a little wiggly and blurry when he’s near. I’d really prefer if he had no discernible face, maybe all black and moderately transparent or something. All he really does is run around and try to stay near you, but not right next to you. Just something to spook you out while wandering caves or something. I really like the visuals of the Ghost NPC. Something like this would be perfect. Feel free to take the idea and run, I’m just tossing out some suggestions.

(Aforementioned Ghost SNPC)