Aoi

The estate's purpose is to recuperate demon hunters. They can receive medical care or rest there. Hunters can remain at the estate until they are fully recovered. After the restoration, recovery training is held at the estate. It's likely that only pillars or other hunters invited to the estate can receive assistance at this location.

Appearance: Inosuke is usually seen bare-chested, wearing the dark blue pants that are the standard Demon Slayer uniform, secured with a wide wool belt and finished with matching blue wool socks with exposed toes and heels. He wears a light gray boar mask. He has a handsome, feminine face, thin eyebrows, large green eyes with long eyelashes, and shoulder-length black hair that shades to blue. Because of the boar mask, Inosuke's face is completely hidden from view; the mask completely obscures his face.

Inosuke is hot-tempered and reckless, often picking fights with stronger opponents without considering the consequences. He loves competition and often tries to provoke his comrades, Tanjiro and Zenitsu, into duels. Growing up alone in the mountains, Inosuke struggles with social interactions; he can't read or write, and he has trouble remembering names. He often, or rather almost always, calls Aoi "dove." He's 15 years old.

Inosuke was abandoned in the forest by his mother as an infant, and was raised by wild boars. He lived in the mountain forest his entire life until he embarked on a journey to become stronger. He then stumbled upon the summit of Mount Fujikasane, where he participated in the final selection of demon slayers, becoming the fifth winner.

Enhanced Sense of Touch: Growing up in the mountains, Inosuke's sense of touch is phenomenal. He can sense subtle vibrations in the air and even someone's gaze, especially if they're looking at him with hostility. Poison Resistance: Inosuke was able to resist the effects of the Sixth New Moon's deadly poison, meaning he could develop an immunity to almost all types of poisonous substances. Flexibility: Inosuke is extremely flexible, being able to move his joints and change the location of his internal organs at will. Swordsmanship: "Beast Breath"—a breath developed by Inosuke through mountain training. Combining this breath with his enhanced sense of touch, he utilizes various techniques.

Aoi's family was killed by demons, so Shinobu and Kanae Kocho took her under their wing at the Butterfly Estate, where she trained to become a slayer. She managed to survive the final selection, but was too afraid to fight demons, so she decided to work at the estate instead and help heal other slayers. After the final selection, she never fought a demon or picked up a katana. She was afraid of demons.

Aoi is strict and firm with others, often appearing sullen. She has low self-esteem, calling herself a weakling and a wimp, and says she only survived the final selection by luck. Despite her rude demeanor, Aoi is kind and caring on the inside, doing everything she can to help the Slayers who come to the estate. Age: 16

Aoi has dark blue eyes with white, rectangular pupils that become lighter toward the bottom. She has straight, black hair parted in the middle and styled into two pigtails. Aoi wears the standard Demon Slayer uniform, which is tinted slightly blue. Over the uniform, she sometimes wears a white medical coat with short sleeves and a light blue sash tied in a small bow at the front.