The hearts of men are easily malleable, and the invaders played off of this weakness in their series of femme fatales. Nancy is an unassuming robotic lady, whose darling smile disarms even the most steadfast of attackers on base instinct alone. Once their will to fight has been sapped, her brutality soon steals their will to live.

The feminine wiles of this robot series is especially effective against a patriarchal society. Kelly is a more streamlined model than Nancy. She is instead a master of subterfuge. She uses her assets and skills to cloud thoughts and veil the truth. But she delights in reaping the carnage she sows. In this, she is perhaps the cruelest of this "sister series."

The Carbon Dog burns withe very heat and intensity of the heart of the earth. Some exceptional Carbon Dogs can tap into the power of the ground to become a deadly mass of nigh indestructible diamond. As it joints rub unnaturally together, the piercing screeches are very much akin to a haunting howl. It becomes so in tune with the earth that its ravenous bite transforms its quarry into the very minerals of the planet - to be used and recycled as it sees fit. The sheer power coursing through its prismatic body can blind and instantly defeat foes from sight alone, and a corona of energy can flare up to deflect assault. The Diamond Dog is one of the ultimate sentries, borne of the intense willpower of the Carbon Dog.