Nope. I refuse to believe it. Nothing in mainstream entertainment that cute and adorable can possibly be evil. I haven't seen the last 2-3 episodes, and I don't know anything about them. But I'm pretty sure we're far past the storm, too late now.
It's time for a big villain showdown. And I'm 99.98% confident Cozy Glow isn't even going to be in much focus, if at all.