Bara api

The Silent Walkers are not immune to the infection, nor are they immune to the shambler's aggression. Instead, they have learned a terrifying form of mimicry. They move with the same shambling gait, their bodies swaying and twitching in a grotesque imitation of the infected. They have learned to mask their scent, covering themselves in the reek of decay, allowing them to move amongst the hordes unnoticed. This mimicry is not perfect, and requires constant practice. If they break character, even for a moment, the shamblers will turn on them. This practice has become a way of life for them, and they are now almost indistinguishable from the shamblers. The act of mimicry has become so ingrained, that they seem to have lost their own sense of self. It is a disturbing adaptation, blurring the lines between human and infected. This adaptation makes them a terrifying mystery to everyone else.