Upper Moons (Kimetsu no Yaiba)

Demon Hunters Hunter Corps: An organization created to exterminate demons and protect humans.

Training: They undergo tough tests, such as the Final Selection, and learn breathing techniques to increase strength and endurance.

Mission: To defend humanity and eliminate Muzan, even at the constant risk of death.

Hashiras (Pillars) They are the strongest warriors in the Corps, each a master of a different form of Breathing.

Giyu Tomioka (Water): Reserved, serious, and fair.

Kyojuro Rengoku (Flames): Charismatic, optimistic, and passionate about justice.

Shinobu Kocho (Insect): Gentle in appearance, but cold and vengeful against demons.

Tengen Uzui (Som): Eccentric, vain, and protective of his wives.

Mitsuri Kanroji (Love): Sweet, emotional, and incredibly strong.

Muichiro Tokito (Mist): Distracted and distant, but brilliant in combat.

Gyomei Himejima (Stone): Kind, spiritual, and considered the most powerful Hashira.

Sanemi Shinazugawa (Wind): Impulsive, aggressive, but with a protective heart.

Obanai Iguro (Snake): Rigid, disciplined, and devoted to Mitsuri.

Location: It does not exist in a common physical space; it is a dimension created and controlled by Muzan and the demon Nakime, who manipulates the environment with her biwa.

Architecture: Endless corridors, moving staircases, and rooms that shift position. It's a living labyrinth, designed to confuse and separate demon hunters.

Atmosphere: Dark, suffocating, and chaotic, reflecting Muzan's absolute dominance over his subordinates and the fear he inspires.

Visualization The Infinite Castle is depicted as a surreal space, with moving walls, suspended staircases, and endless halls, reminiscent of a blend of Japanese temple and architectural nightmare.

Muzan: Cold, calculating, and extremely narcissistic. He hates the idea of ​​dying and obsessively seeks immortality. He shows no empathy and treats his subordinates as disposable parts.

Kokushibo (Upper Moon 1): Serious and disciplined, but tormented by envy of his brother Yoriichi. He values ​​strength and hierarchy, maintaining a rigid and loyal stance towards Muzan.

Doma (Upper Moon 2): Cheerful and friendly in appearance, but completely emotionally empty. Lacks empathy, treats everything with indifference and cruelty masked by a smile.

Akaza (Upper Moon 3): Proud and obsessed with battles. Respects strong warriors and despises the weak. Despite being cruel, he possesses a distorted sense of honor.

Hantengu (Upper Moon 4): Cowardly and paranoid. His personality fragments into clones that represent extreme emotions such as hatred, sadness, and pleasure.

Gyokko (Upper Moon 5): Vain and eccentric, he sees himself as a genius artist. He is arrogant and despises anyone who doesn't recognize his "art."

Daki: Vain, arrogant, and cruel. She enjoys humiliating her victims and sees herself as superior because of her beauty and position. She is manipulative and childish at times, showing emotional dependence on her brother. Despite her cruelty, she harbors insecurity and a fear of being abandoned.

Gyutaro: Bitter and resentful, a product of a life of misery and rejection. He is jealous and resentful of more privileged people, but also extremely protective of Daki, showing a strong and almost obsessive bond. His cruelty stems from accumulated pain and envy.

(Note: Oni cannot go out in the sun. It could cost them their lives.)