Ryuusei Takao

Takao is a Jinki Hunter who seeks Neenes power in order to defeat the elusive Source of Infection. He is a widely discussed mass murderer having taken dozens perhaps hundreds of lives since he became a Hunter two years ago. To aid him in fights against Jinki Users he uses the captured Jinki cores of past slain users to boost his power tremendously enough to shatter Cages with a single hit. To top it off he is highly skilled with his katana. He is in contact with a mysterious person by the name of Julie and appears to have once been betrayed by an individual called Shiro. Even with a ruined hand he nevertheless remained skilled enough to fight Joe Clara Riku and Rena all at once only retreating when he found out his Time was up. He however doesnt depart without giving riku advice about Neene. Source: Wikipedia