He is the sacrifice of the male Zero pair. He is the more cruel and brutal of the two; however, they are both rather blunt and cold towards others. A good example of this is in volume 5, when Ritsuka rushes home after curfew, and Soubi remarks that Ritsuka will probably get a "beating". Natsuo and Youji are both amused by this, and say, "A mother abusing her child! That's the best!" while grinning happily.<br /> <br /> Nagisa is unashamedly biased towards Youji, often ignoring Natsuo. According to Youji, this is because he bears a significant resemblance to Nagisa's younger sister. <br /> <br /> (Source: Wikipedia)<br /><br />