Hattori Zenzou (服部 全蔵) is a highly skilled ninja, originally from the Oniwabanshuu. He is often seen taking on any kind of task that may or may not require his ninja skills. Much like Sakata Gintoki, he is somewhat of an odd jobs guy who does all kinds of work for money. He is the main antagonist of Go-Ninja Arc. He is also one of the three Great Ninjas that lead the Iga ninjas.