Demon Slayer Corps

The Demon Slayer Corps is an organization that has existed since ancient times, dedicating its existence to protecting humanity from demons.

Overview
The Corps is not officially recognized by the government and operates underground. The Corps' and its members' existence are more or less a folktale among the public, as evidenced by a civilian's surprised reaction to witnessing a Demon Slayer in action against a demon in reality.

As the Ubuyashiki family members possess a heightened level of foresight, they used it to amass a great amount of wealth and fortune which they use to fund the Corps' daily operations.

History
About a thousand years ago, a distant relative of the current Ubuyashiki family named Muzan Kibutsuji had turned into the first demon. Having produced the Demon Progenitor, the Ubuyashiki bloodline was then being cursed. Every child born in the family were sickly and weak, and would die before they were even fully grown. When the family was about to get wiped from existence, a priest they consulted gave them the advice that the family must dedicate their soul to defeating the Demon Progenitor and purging the world of demons in order to lift the curse. Since then, the Demon Slayer Corps was formed and the Ubuyashiki family has led the battle against Muzan for almost a millennium. Those born in the clan had become more resistant to death than before, but still died before they became thirty.

With Muzan's demise and the near-extinction of the demon race, the Corps officially disbanded. The last leader of the Corps, Kiriya Ubuyashiki, was freed from the curse and even became the oldest living person in Japan.

Oyakata-sama
The Oyakata-sama is the leader of the Demon Slayer Corps. The eldest son of the Ubuyashiki family inherits the position after his father's death. In the daily management of the Corps he is assisted by his family members. Using Kasugai Crows he keeps himself up-to-date and communicates with the members of the Corps.

Demon Slayers
The Demon Slayers are the most prominent members of the Corps. There are hundreds of Demon Slayers within the organization. They are the combatants of the organization and their daily job is to hunt demons and slay them. The group of elite Demon Slayers are known as the Hashira and their successors are the Tsuguko.

Kakushi
Within the Corps, there is a cleanup crew known as the Kakushi, where the majority of them have no swordsmanship skills. The Kakushi are responsible for providing first aid to injured Demon Slayers following a large battle, as well as bringing the injured in for proper medical attention.

Swordsmiths
Affiliated with the Corps are the swordsmiths from the Swordsmith Village, where they work on forging and repairing Nichirin Swords in foundries and workshops, as well as create other combat and training equipments, such as the Yoriichi Type Zero battle doll.

Demon Slayer Corps Headquarters
The Corps Headquarters is located at the Ubuyashiki Estate. Here the Oyakata-sama resides with his family where he does the daily management of the Corps. It is also the location where he holds his biannual Hashira Meeting.

Mount Fujikasane
Mount Fujikasane is the venue of the Final Selection, an entrance exam organized by the Corps to test candidates who wants to become a Demon Slayer.

Swordsmith Village
The Swordsmith Village is home to swordsmiths who forge the Nichirin Swords for members of the Demon Slayer Corps. In order to prevent demons from attacking the village, the exact location is kept confidential.

Butterfly Mansion
The Butterfly Mansion is a manor affiliated with the Corps that serves as a recovery base for injured Demon Slayers.

Known Members
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