Hector's main adversary, whose identity has yet to be discerned. "The Nihilist" is a paramilitary operative who has participated in various illegal black ops on behalf of corporate interests. "The Nihilist" is also an expert battleframe pilot, often seen using an operator exoskeleton ( fav.me/d6xe35c
) equipped with heavy weapons. And of course his codename describes his personal philosophy quite accurately.
Also, helmet designs are a bitch - it gets to a point where everything looks the same as it does elsewhere. But whatever.