Nukenin

Runaway Shinobi are ninjas that abandon the Shinobi trive to which they're related. Secession is under circumstances allowed in Shinobi society. The shinobi always keep heir secrecy, and in order to do so they follow an unbreakable code that maintains their livelihood and existence. Accordingly, those who escape the tribe's control with sensitive internal information are a very serious threat. These threats must be eliminated at all costs, and a band of Ninjas is often dispatched to kill the "runaway" Shinobi. This example was shown in Kasumi's ending from Dead or Alive 3, when she survived a horde of Ninja sent by Hayate. It is thus considered suicidial to become a "runaway" Shinobi. A cruel fate awaits anyone who should attempt it.