Before she worked with Dr. Callibrator to turn herself into a vicious war machine, FF6402 was a low-ranking officer in the Egg Army - at the time, just another simple Mobian who had been swept up in a horrific planet-wide war. Trying to survive at the devil's side rather than be in his path. She befriended a reclusive genius, a crocodile roboticist known as The Callibrator. She came to know her as Callie. Two friends alone against a backdrop of bloodshed and insanity. They hatched a plan to create the next generation in reproducable superweapons - using the fox herself as the base materials. Both Mobians were unhinged, feeding off one anothers' dysfunction and forming a strong Us-Vs-The-World alliance.