The Golem of Prague was created by a rabbi in Prague (surprisingly), to protect the Jewish ghetto there from anti-semitic attacks. Formed from clay and animated by ancient rituals, the Golem followed its orders to the letter, eventually growing out of control as it rampaged, killing innocents for the crime of not being jewish, and conflicting orders caused it to go completely haywire, killing basically everyone it saw until it was deactivated. Supposedly entombed in the Rabbi's attic, the Golem has since disappeared.
The Golem of Prague is an enormous Persona, over ten feet tall and of an incalculable theoretical weight. The Golem is composed entirely of a slick, dark-brown clay that bends and molds to suit its will, even completely changing its form. An iron ring cinches each wrist and ankle-like zone - its feet are mere nubs that flatten across the ground, and it has giant, oversized hands. It has no neck, its shoulders simply smoothing up into a dome-like head.
The Golem's face resembles that of a haniwa, its eyes and mouth simply deep black pits. A strip of paper emerges from its mouth and spirals around its entire body, inscribed with the names of God in every language known to Man, and some that are not. The hebrew word 'emet', or 'truth', is carved into its forehead. The word glows with bright blue light.
William is, because of his double life, tightly focused on keeping himself from resonating strongly when living in his 'preferred' life as William Blazer, Traffic Cop From Hell. The most you'll probably get when he's trying to hold it in is that he /has/ some kind of resonance - military discipline serves him well here. However, he's so focused on his own resonance that he barely notices others - he has to relax his discipline to really sense resonances, which causes his own to unfurl like a banner.
NWO Crouching Grunt Hidden Badass, however... SENSE: Imagine yourself trapped in the center of an enormous, sprawling labyrinthe. Possibilities are open everywhere, but you have no map, and no light. That's William: the feeling of groping along in the darkness down limitless paths, desperately wanting to find a place but not knowing where you'll end up - with nothing to count on but the immovable sturdiness of the walls around you.
SMELL: Smoke and clay, with a weak impression of gunpowder and old blood.
SOUND: Powerful, rumbling bass impacts heard through a thick stone wall, irregularly timed but never allowed to grow louder.