[ Gaunt nods, and pauses for a moment, trying to decide how to best explain it. ]
His body doubles, the Sirkles. They all are surgically altered to look like Rime, and have some degree of psychic potential so they can further alter their facial and cranial structure to look like various other people. As near as we can tell, Rime can move from one of his servants to another upon their death, acting as a sort of animating force behind his... rather disgustingly crafted servants. He's rather like a hydra, in some ways. You cut a head off and another one replaces it. The best thing to do is evade his gaze, and that means keeping a low profile.