Well, this Kurosuōbā is a bit of a mystery and a half, though I do think that death or a similarly ill fate is on the cards if this maxes out or goes beyond. Looking pack at the police station search, we specifically got told THIS when our Tapu Lele pal got hit with 6 Kuro points:

You shiver, feeling like more than half of you has been detached and disconnected from this very realm of reality. It almost feels as though some other kind of dimension is trying to lure you and enrapture you through these bizarre artifacts.
If that doesn't scream to be careful then I don't know what does. Looking into finding a cure as of now is a medium priority case, so I recommend we try and look for folk who work in the chapels as they may be more knowledgeable with spiritual stuff like this when morning comes.