As promised, I'll show of one concept.

Crimson Guard, The;
Whenever the Townwatch proves to be useless idiots, CrimGuard is showing up to clean up the mess. They are well trained elite soldiers, equiped with tanks on theris backs, that suck air into a filter. Cleaned of any other smells, it alows the CrimGuard to fully concentrate on the scent of his prey. They hold up the Stultita and investigate violations against it. The inquisition of my story.

I realy love that guys! They'll become the player's deepest horror. Hard to kill and hard to avoid. They'll even have some bugs as bloodhounds. Don't mess with them!