User blog comment:Lord Loss/Monster Hunter Theory... Blog/@comment-4361439-20130528183518/@comment-174.52.196.175-20130528234303

Their pointy heads might be fragile too. A head like that would probably break if bent too far, considering how thin they are. Snapping their head would kill them instantly unless their brains weren't in their heads.

So maybe having the mask has another function. As well as intimidating predators as mentioned above, maybe masks serve to protect the fragile skull, similar to a hermit crab collecting a shell for protection.