User blog comment:Mckrongs/Monster Hunter 4 for the Nintendo 3DS/@comment-118.137.140.117-20121214044024/@comment-74.193.211.56-20121214083720

I'm pretty sure its just demonization mode with purple instead of red not the Dragon Virus. As I said when a hunter is infected with the virus the aura surrounding them is a darkish purple and black.