Chisa Yokoyama

Isaac Netero is the chairman of the Hunter Association. Decades ago he sealed away Jed, a Hunter who had mastered the use of On, the dark "shadow" of Nen. Now On users have reappeared at the Heaven's Arena "Battle Olympia" tournament. For Netero, this is the last mission: to protect the Association and the world from a threat driven by hatred and the thirst for revenge. And he's going to need all the help he can get in order to succeed.

Mr. Takazawa, an elderly invalid who is cared for at his home by Haruko, a young nursing student, is chosen by the Japanese Ministry of Public Welfare to test the Z-001, a computerized hospital bed with robotic features that allegedly displays more efficiency and skills than any human nurse, but Haruko mistrusts a machine unable to consider human feelings.