Konohagakure Anbu

The Anbu (暗部), or Ansatsu Senjutsu Tokushu Butai (暗殺戦術特殊部隊), is a special organization of elite ninja who have been hand-picked by the Hokage to perform dangerous missions that require advanced skills beyond the scope of normal shinobi. It is a secretive group, where only a handful of people within the village know who is and isn't a part of it. They are specially organized and high-ranking, generally holding jurisdiction over regular shinobi.

Organization
The Anbu in Konohagakure consists of a tenth of the total shinobi population. At the top of the chain of command is the Hokage. They command the Anbu and give them missions. Below him are the five captains, or the Goi (五尉, Five Captains). Each captain commands a Shōtai, or platoon, which specializes in a specific area. Each Shōtai is unique, and possess different skills suitable for their jobs. Each Shōtai has a designated call sign.

Alpha Shōtai
Alpha Shōtai is the strongest force