Kinah/Charlie
Have you asked Vic about it? If it's magical, he should at least be able to confirm it. He figured out that's what was making people fall in love a couple of months ago.
Alex McCoy seems to have lost his powers, too. He was pretty giddy about it when I ran into him - he might not come in unless someone specifically tells him to. General casting calls are pretty easy to ignore when you're convinced you're fine.