Nagi was shunned as a child by the people around him because of his telekinetic powers. He was living on the streets for quite a long time, then taken in by a nurse, who lead an orphanage. Due to the fact, that the nurse actually was using the children living in the orphanage to commit crimes, Weiss was ordered to kill the nurse. Ken, who knew a girl from the orphanage and thereby got to know Nagi as well, was the one to kill the nurse. Nagi witnessed the murder and as a result he made the church collapse by using his telekinetic powers - and from there on hated Ken in specific. He ran off and found shelter at Crawfords, who then took him in. Then he started to work with and for Schwarz to get revenge on both Ken and the world for the way everybody treated him when he was a child. He is very solemn and embittered towards the world. Codename: Prodigy.