Shinobu Kochō

Shinobu is also the younger sister of Kanae Kocho along with her adoptive younger sister Kanao Tsuyuri. After a demon killed her parents, Shinobu joined the Demon Slayer Corps along with her sister in order to protect others from suffering the same fate as her. Shinobu is a petite young woman with a slender build and a fairly pale complexion. She has large eyes that lack pupils, only a haze of gradient purple, making her eyes appear similar to those of insects, and rose pink lips. She has raven-black wavy hair that fades into a dark purple hue at the ends, styled at the back of her head into a flat yakai-maki bun fastened with a white, turquoise and light purple butterfly ornament. She has center-split, ear-length, voluminous curtain bangs that flow down to frame the sides of her face, with two slightly thinner chin-length locks of hair in front of her ears below them. Both of which grow an inch longer later on in the series. She stands out among the more physically imposing Hashira due to her diminutive stature and small frame, which is later reinforced by her mentioning that she does not possess enough physical strength to decapitate a demon as the others do. According to Zenitsu, Shinobu is so cute that she could make a living on her looks alone. Shinobu wears a dark purple tinted standard Demon Slayer uniform, consisting of a button-up jacket with golden buttons, stand collar, and long sleeves, having the kanji for "Destroy" engraved on the back, a shirt pocket on top of the left breast, matching the dark purple color of her tabi socks and her long saggy tattsuke hakama pants, that is wrapped by a pair of white butterfly-patterned Kyahan fading into a pale turquoise to pink shade around her lower legs, fastened with white ribbons. Over her uniform, she wears a white haori that previously belonged to her older sister, which has a butterfly wing pattern, especially that of a Monarch Butterfly, that fades into a pale turquoise then pink color gradient on the sleeves and hem which are cuffed with a black and white dotted trim. She wears white zōri sandals with purple straps for footwear; she conceals a hidden blade in the right sandal. Shinobu displays a bright, friendly and cheerful demeanor, always having an easygoing smile on her face regardless of the situation she is in. However, her outward behavior is shown very quickly to be a façade. This is displayed in the way she enjoys teasing others, to the point of being rather sadistic about it, enjoying most notably to pick on Giyu Tomioka. Despite her relaxed exterior and her initial claim of wanting to get along with demons, she can be rather cruel towards them, which is seen when she kills Daughter after giving her false hope of helping her, and immediately attempting to kill Nezuko Kamado without giving Tanjiro Kamado a chance to prove that she was harmless to humans. Later on, she is shown to have a more compassionate side towards both Tanjiro and his sister after hearing their full story.It is later revealed that her outwardly calm and tranquil disposition is worn as a mask, as Shinobu holds an intense hatred for demons due to the loss of her sister, Kanae Kocho, at a young age, along with the deaths of her parents, almost all of her Tsuguko, and the families of her apprentices at the Butterfly Mansion. This hatred is so strong that she is in a near-constant state of extreme anger, which is sensed by Tanjiro Kamado when the two individuals hold a conversation. Her desire for revenge rendered her unable to live the normal life her sister had wished upon her, instead devoting the entirety of her energy to defeating demons. During her battle against Doma, Shinobu reveals that she also suffers from an inferiority complex due to her inferior physical abilities compared to her fellow Hashira, having been jealous of them for possessing taller or more muscular bodies than her and cursing her own body for not developing further to make her more effective in combat.

A densely packed forest in the midst of Taishō Era Japan, just outside of a nearby village that has been plagued by Demons from said forest.

The Butterfly Mansion is the manor that the late Flower Hashira Kanae Kocho, Insect Hashira Shinobu Kocho, Tsuguko Kanao Tsuyuri, and assistants Aoi Kanzaki, Sumi Nakahara, Kiyo Terauchi, and Naho Takada live in. The manor is often used as a recovery base for injured Demon Slayers. The majority of healing at the mansion is done by Shinobu Kocho, though there are also attendants known as Kakushi who run errands and assist in watching over the injured. On top of this, there are others who live in the mansion that are not Demon Slayers, but offer training regiments to facilitate the recovery process and help the injured Demon Slayers reach top condition again. For example, Aoi Kanzaki creates a training regiment meant to help Tanjiro Kamado, Inosuke Hashibira, and Zenitsu Agatsuma recover after their battles on Mount Natagumo. After Nezuko Kamado became the first demon to conquer the sun, she was relocated to the Butterfly Mansion for her protection with Sakonji Urokodaki as her caretaker. In addition Kiriya, Kuina, and Kanata Ubuyashiki were stationed at the mansion to prepare and aid for the eventual battle against Muzan Kibutsuji, and to keep tabs on the corps when they were forced inside the Infinity Castle using Kasugai Crows and Yushiro's Blood Demon Art. Former-Hashira Tengen Uzui and Shinjuro Rengoku acted as bodyguards and Suma was also present at the mansion but her role is unknown. The first Flower Breathing user planted the cherry blossom tree in the garden of the Butterfly Mansion, and gave it the name "Victory Tree". After the final battle against Muzan Kibutsuji, Kanao Tsuyuri visited the tree to tell it that they are victorious.