Kakushi

The Kakushi are a brigade of people who work as attendants to the Demon Slayer Corps.

Overview
The Kakushi are a brigade responsible for different tasks, which can range from providing services to Corps members to cleaning up the battlefield after Demon attacks.

Other tasks performed by the Kakushi include:
 * Serving as attendants of the Butterfly Mansion, where 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.

In some cases, Kakushi are Demon Slayers who have been injured and retire from being Demon Slayers. There are also individuals who failed to pass the Final Selection examination but become Kakushi in order to still be of use to the Demon Slayer Corps.

Attire
They wear dark versions of the standard Demon Slayer uniforms consisting of a modified gakuran jacket and hakama pants. Said gakuran jacket has a longer hem and puffed sleeves to allow them to move freely, with the kanji of the brigade's name inked on the back (隠). Their forearms and their shins are covered in a black stretchy fabric, securing their sleeves and hakama respectively. For footwear, they wear plain white tabi socks connected to reed-colored zori flats.

To protect their identity, they wear dark head coverings with white linings, and a paper-like mask with three dark lines is tied around their face, divided in two sections, one in the front and the back, left to hang freely to allow them to speak and breath easily.

History
During the golden era of the Demon Slayers in the Sengoku period, a traitor Demon Slayer named Michikatsu Tsugikuni became a demon and soon after killed the then-acting leader of the Demon Slayer Corps. He took the leader's head to Demon King Muzan Kibutsuji. Ever since then, more effort was put into hiding the residence the Corps' leader lived in. This was the time when the Kakushi were first formed.

Trivia

 * The kanji used for the brigade's name means "hidden" (隠). Other meanings include "conceal", "invisible", "pity", "sympathize", which overall reflects the nature of their work.