No idea why it took so long, but the rabbit mask looks like the one from The Voynich Hotel. In that comic, the mask was a traded item that showed the true form of things like demons and allowed someone to bypass their issues like anxiety to speak their mind.
I'd laugh for quite a while if any of the characters from that comic showed up. Not going to happen, but I think the hotel manager that knocked Chuck Norris' tooth out would be very useful right now, or one of the witches.