Hattori, Zenzou

服部全蔵

A highly skilled ninja with a light-brown/dark-blonde mop top and a goatee. He makes his first appearance in episode 37, where he and Gintoki attempt to fight to the death over the last remaining copy of the Christmas double issue of Jump, which turns out to actually be the Christmas double issue of Akamaru Jump. (In fact, he first appeared in episode 36 as the conman dreamcatcher's assistant.) Apparently, he used to belong to the Oniwabanshu as well and knows Ayame. He is the first ninja in the series to apparently match Gintoki's skill level and obsessive devotion to Jump. He apparently suffers from hemorrhoids. He leads a freelance ninja team known as the "Shinobi 5." His father is said to be the strongest man in the Oniwabanshu and an instructor to many of his peers, including Ayame Sarutobi.
His name is roughly based on a famous ninja from Iga, Hattori Hanzou.