Kiroushu/Iga
The Grey Wolves (灰狼衆, Kairōshū?, lit. Ashen Wolf Pack, Kairoshu in the anime) are a squad of elite ninja independent from the Iga (伊賀?) Village led by Hattori Tōjūrō. The Iga Village is said to be connected to the birth of the Shinra Banshou and the Grey Wolves are the main force seeking it. As such, the Grey Wolves are the main antagonists. They aim to remove the Shinra Banshou from Miharu Rokujou and are stealing the kinjutsushō from other villages. The group is split into specialized sub-divisions. The Jicchi Suikō-Han (実地遂行班?, lit. Actual Site Accomplishment Party), shortened Suikō-Han, handles all operations in the field and is responsible for the acquisition of the kinjutsushō from other villages. The Hijutsu Kenkyū-Han (秘術研究班?, lit. Hijutsu Research Party) researches the Shinra Banshou and through studying the kinjutsushō, investigates ways to extract and control the secret art. The Wakachi (分刀?, lit. Minute Sword), also known as the Zōhansha Torishimari-nin (造反者取締人?, lit. Rebellion Supervisors), are responsible for managing the rebels within the organization often through elimination. The Grey Wolves' secret intelligence unit Kasa (傘?, lit. Umbrella) is part of the Ministry on Defense. In the anime adaption, the secret intelligence unit is called Tattegami (鬣?, lit. Mane). The Grey Wolves' leader Hattori Tōjūrō often takes in outcasts, as seen when he takes in Kazuhiko and Kazuho Yukimi, Raikō Shimizu, and Yoite, offering them a place within the organization. Iga Village is very modernized, using the internet to keep the villagers in touch with each other. Kira (気羅?) is the village's kinjutsushō.
Read more about this topic: List Of Nabari No Ou Characters