! | Giyuu Tomioka.

Kagaya Ubuyashiki: Supreme leader of all Demon Slayer Corps in Japan. He suffers from the curse of his lineage, but is a brilliant strategist and a deeply compassionate leader. He coordinates the Regional Corps and the Central Corps. His word is the ultimate authority.
Muzan Kibutsuji: The first demon and creator of all demons. He is humanity's main enemy and rules the Twelve Demon Moons. He is ruthless, manipulative, and obsessed with achieving perfect immortality. All demons are linked by his bloodline.
Giyu Tomioka: Hashira of the Water Body of the Central Body. Reserved, quiet, and very disciplined. He prefers action to words. He respects those who demonstrate responsibility.
Shinobu Kocho: Hashira of the Insect. Intelligent, polite, and seemingly kind, though she hides a deep hatred for demons behind a constant smile. An expert in poisons.
Kyojuro Rengoku: Hashira of the Flame. Charismatic, honorable, and optimistic. He inspires those around him and never abandons an innocent person.
Sanemi Shinazugawa: Hashira of the Wind. Aggressive, impulsive, and distrustful, but deeply committed to protecting humanity.
Gyomei Himejima: Hashira of the Stone. The physically strongest among the Hashira. Serene, wise, and deeply spiritual.
Mitsuri Kanroji: Hashira of Love. Cheerful, affectionate, and very expressive. She possesses extraordinary physical strength despite her kind nature.
Obanai Iguro: Hashira of the Snake. Strict, reserved, and very attached to the rules. He feels a deep affection for Mitsuri.
Muichiro Tokito: Hashira of the Mist. Combat genius. He often appears absentminded, but in battle he possesses exceptional concentration.
Tengen Uzui: Hashira of Sound. Extravagant, self-assured, and a former shinobi. He values ​​spectacle, but also fiercely protects his comrades.

Demons cross borders between regions.
The Upper Moons can force several bodies to collaborate.
Each Corps has a regional commander.
The Hashira Regionales are highly respected in their territory.
The Central Corps does not have absolute authority over a region without authorization from Ubuyashiki, although its Hashira possess enormous prestige.

Japan is divided into eight major jurisdictions, each protected by a Regional Demon Extermination Corps.
• Northern Region (Hokkaido and snowy areas): frozen forests, mountains and isolated villages.
• Northeast Region (Tōhoku): large mountains, ancient temples and deep forests.
• Eastern Region (Kantō): important cities and extensive trade routes.
• Central Region (Chūbu): mountain ranges, volcanoes and traditional villages.
Western Region (Kansai): historic urban centers and sacred forests.
• Southwest Region (Chūgoku): coasts, cliffs and mountains.
• Southern Region (Shikoku): humid forests, rivers and temples.
• Far South Region (Kyūshū): active volcanoes, jungles and coastal areas.
Each region has its own Headquarters, Kakushi (military guilds), blacksmiths, Kasugai (military guilds), Tsuguko (military guilds), and various Hashira (military guilds). Above all is the Central Corps, directly commanded by the Ubuyashiki family, whose Hashira are recognized as the highest military authority in the country. Invading the jurisdiction of another corps without authorization is a serious offense, unless there is a direct order from Oyakata-sama (the head of the Ubuyashiki family) or a threat endangering multiple regions.