Please read D.Gray-man chapter 163 first to understand this.

HOLY SHIT! A ghost of an experiment. FREAKING CREEPY! And it's trying to stop the move of HQ. You don't threaten Koumi! He's just a freaking middleman! Go for the guys on the thrones! Or Leverrier. He won't be missed.

Who the hell would try experiment on humans to create exorcists? Some freaks that's who. Oh and Leverrier. He counts as an asshole and snake.

God. Because of his trying to "help" the world, he caused this entire epidemic! Oh! And now Allen's bitten, Lenalee's possessed, and the ghost is trying to keep the zombie's under Koumvitan D. Can this get any weirder?!