Cooper retains enough of his super special healing powers - - like when as DougieCoop he used somehow to make Rodney's abrasion inflictd by Candie disappear magically from his face - - to heal Sheriff Harry of unspecified illness/ affliction. A laying-on-of-hands: like with Anthony! He then deems it necessary to turn his sheer force of good will and "brighten-the-corner-where-you-are" on Twin Peaks and all its ailments: a laying on of mindset. In effect, he heals the whole damn town!
All right, for final prediction? I think Candie is Linda (may or may not be a relation to Cooper). What puts her over the top for me is DKL went out of his way to cut a shot of the pink ladies into Part 5, same part Richard was introed in.