Well 42 is a nineteen year old android who shares her body with the spirit of a long dead saiyan. Origanlly built by a scientist who was devoted to Dr.Gero's work and had stumbled upon the files showing how the 'Cell Android' was made and then used the plans to create an even more better, more stronger android...Unfortunetly 42 killed him out of rage after he failed to finish recreating her younger sister. But even though she is a killing machine, in the stories I have written of her she is more of an anti-hero chic..who some how always seems to do good in the end.