Board Thread:General Discussion/@comment-1957688-20130902233726/@comment-32390199-20130922134734

I think that Adam is a special kind of Faunus, the things that sprout out of his head are ears I believe (though they also could be attached to his mask).

It is that we know so little about the Faunus. If they Faunus are humans who are closer to the Grimm, which they will become when they lose their souls, then Adam could one that is very close to being a Grimm. He wears the mask to hold the power of the Grimm in himself back, and when he uses his Grimm power to much it will slowly make him turn into a Grimm. Maybe he even has red eyes, similar to the Grimm.