An important and accomplished shinobi from the Chūnin Clan, Kenshirō is Koei's primary informant and target within the clan. He is very knowledgeable on its operations, he gives the Chūnin Clan its intelligence and leads them through the layout of the area, the enemies in the area, and how to use the terrain. His position as the Chūnin Clan's informant may be because he is the former bodyguard of the councilman, and after this incident he turned against his former employer. He is also known for his knowledge of infirmary procedures, as he is a medical doctor.
Kenshirō is also extremely overconfident, he believes himself to be extremely skilled and strong, he is a master of unarmed combat, and is a strong attacker. He also has a tendency to slap women he is attracted to on the face, which makes him a subject of ridicule. However, when he comes into conflict with somebody else, he will defend his honor to the best of his abilities. In the manga, he was shown to have a crush on the female council member, Kaede Amemiya, which motivated him to retrieve the Genkaku on her behalf. He could be seen as somewhat of a pacifist and gentleman in the series, as shown in the anime adaptation, where he followed a search party for the Chūnin and the Genkaku that were captured. However, as the series progresses, he does seem to lose some of his pacifism, showing his true bloodlust after the Shinigami was killed by Gōzame. In the manga, Kenshirō is shown to be a very skilled swordsman.
Kenshirō is also shown to have a rivalry with Jirōbō and his party, because they also want the Genkaku, though Jirōbō does not want Kaede Amemiya, but wants the Genkaku for himself. In the manga, Kenshirō is shown to be a very skilled swordsman.
Jirōbō is the leader of a group of travelling bandits who become Koei's allies in the search for the Genkaku. Though he is an old man, he is very strong and adept at hand-to-hand combat. He is very old-fashioned and is thought of as very childish, though his true nature is shown when he is enraged. He is also very quick to anger, he is cunning and is a master of martial arts and weapon techniques, he is a natural leader and is capable of controlling his troops. He also has a mysterious aura about him, which indicates that he is a spy for someone in the series, though nobody knows who he is. In the anime, his known as a rather gentle, polite and cautious man, though as the series continues, 0b46394aab