Harriken is a not a shape-shifter per se. After killing a person, he removes his head and places the head of his victim on his own shoulders. With this, he can create an illusion that he is that person. This illusion is audible and visual. Unlike most of his demonic brethren, Harriken carries no scent. The illusion can be broken with touch, however, so Herriken tended to impersonate aloof people.
It is unknown how the demon lord got past the supernatural security of the Hoffman Institute headquarters in Seattle, but he killed and impersonated an operations manager for five weeks before stealing the totems of his cabal and setting out for the nearest ley-line confluence, where he performed a ritual that ripped open a [[portal to Hell.]]