Anotsu Kagehisa
Anotsu is the master of the Itto-ryu sword school, a school that has as its motto "the way of the sword is the way of victory!", which roughly means that everything goes, as long as you kill your opponent. Since his grandfather's expulsion from Asano's grandfather's sword school for political reasons, he hates Asano. His grandfather and father were judged harshly by society, and both turned half-insane with rage.
On his deathbed Anotsu's father told Anotsu to destroy every sword school in the country, something which he proceeded to do with remarkable skill and determination. He managed to gather a bunch of social rejects with little morals and much skill, and taught them the way of the Itto-ryu. The Itto-ryu style is best described as "unhinged," which somehow fits the people using it perfectly.
