Kakushi

The Kakushi are a brigade of people who are work as attendants to the Demon Slayer Corps. They wear black uniforms, similar to the Demon Slayers, and wear a black head covering as well as a black and white mask to conceal their identity. They are responsible for different tasks which range from providing services to Corps members, to cleaning up the battlefield after demon attacks.
 * Other tasks preformed by the Kakushi:
 * Attendants of the Butterfly Estate, they provide aid to the manor's residents and those healing on the premises.
 * Cleaning the mess often left behind after a large battle.
 * Sewing and repairing the uniforms Demon Slayers wear.
 * Transporting people to and from the Swordsmith Village.

Often, Kakushi are Demon Slayers who have been injured and retire from being Demon Slayers. But there are also cases in which people fail to pass the examination, but become Kakushi in order to still be of use to the Demon Slayer Corps.