Her dad was missing ligaments between his femur and knee, making his fitness for reproduction pretty terrible. Fortunately one of his creator's peers noticed the problem, and the lord Doctor Xenocide assisted in his reproduction by making this far fitter organism. She is one who can breed with the assistance of the FFF drones. The specifications for this organism's engineering can be found in the instructions for: http://www.thingiverse.com/thing:704983.