Samurai who have fallen into banditry. Though they are called the Nobushi, they do not have a centralized organization.
They possess highly-advanced sword skills and also use crossbows to ambush opponents, using any means to win. Those who have abandoned the title of a martial artist often abandon their dignity as well.
Sometimes they even collude with the Treasure Hoarders or Fatui out of a greed for wealth — or simply to survive.