A research professor who was NijÅ« MensÅ�'s supervisor in NijÅ« MensÅ�'s days as a scientist. Though he warns Chiko against trusting NijÅ« MensÅ�, he is actually obsessed with obtaining NijÅ« MensÅ�'s legacy as a researcher and reaching the "fourth state of water". He does not care for the consequences and believes that the dangerous power of the fourth state of water will change the world, no matter how destructive it is. He also used Seiji Tamiya's research to create enhanced cybernetic bodies for himself and others, eventually changing his body in the image of NijÅ« MensÅ�. Kakihara was the original NijÅ« MensÅ�, but NijÅ« MensÅ�'s thefts began occurring at the same time and the name became attached to the young scientist while Kakihara was forgotten. He is without morals and seeks only to complete the research NijÅ« MensÅ� conducted before the war, believing the research was selfishly kept from him, and had killed many people over the years to obtain it.