Board Thread:Speculation House/@comment-137.112.144.92-20141024021604/@comment-5356197-20141028051206

I can see this being Adam.

Sword, Sword art form.

Think the image on the back was the same, but my PC is crap. His suit may be just a suit, but the Yakuza wear suits too. And the armor is Japanese, therefore the mask would be that of a demon (ergo, a particularly scary Grimm).

And on that last note, I'm thinking the White Fang use mask paint to denote rank. The White Fang page doesn't mention this, but it's clear the more paint the more authority the wearer has, and Adam started out with elaborate paint.

It's also possible he feels somewhat guilty over the previous train heist, in which Blake was clearly upset over his disregard for the train crew.