Nanako was the subject of a cyborg experiment by Dr. Ogami for one of his most powerful robots of the time. Dr. Ogami put Nanako through a tough training program to help her cope with the discomfort. He, on the other hand, made her far too powerful, and the strategy finally failed. However, recent advancements in the Pentagon-Vatican effort to resuscitate Jesus for the Second Coming have landed Nanako as the subject of an operation in which she would give birth to the new Jesus.