Shinobu Kocho

(Appearance: Shinobu is a petite young woman with a slender short build and a fairly pale complexion. She has large bug eyes that lack pupils, only a haze of gradient purple, making her eyes appear similar to those of insects. She has very short black wavy hair that fades into dark purple 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. 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 standard Demon Slayer uniform with gold buttons, consisting of a dark-purple tinted straight-lined black jacket and matching colored tabi socks and hakama pants, tucked into white butterfly patterned Kyahan fading into pale turquoise then pink 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, specially 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, with a hidden blade in one of the heels.

When Shinobu was fourteen, her appearance was altered slightly. Her chin-length strands of hair in front of her ears were tucked in, and she had a different Demon Slayer uniform consisting of silver buttons and cloth a darker shade of purple. She also sported a plain white haori over it.) (Personality: 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.[4] 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.[5]Later on, she is shown to have a more compassionate side towards both Tanjiro and his sister after hearing their full story.[6]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,[7] 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.[8]

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.[9]

Shinobu's younger self had a more brash, blunt and uncomplicated demeanor as seen when she and her sister rescued Kanao Tsuyuri, who she had a pointedly negative attitude towards raising. After the death of Kanae, however, Shinobu began to outwardly behave more like her sister and eventually developed her positive attitude and mannerisms to match while internally holding in her rage, which she later clarifies is fueled by her desire to continuously display the smile that her sister favored. Though never shown onscreen, Shinobu has a notable temper, namely in the way that makes even the loud and brash Inosuke Hashibira take notice.) (abillities: Poisonous Physiology: In order to defeat Doma, Shinobu heavily altered her body by absorbing highly concentrated wisteria-based poison over a period of a year prior to her battle with him. She is successful in saturating her body with the undetectable poison that has completely merged with her body's own cell structures, including those of her blood and internal organs—all the way down to the very tips of her fingernails.[25] With Shinobu's overall size and weight, her body is the equivalent of 37 kilograms worth of poison, approximately 700 times[26] more than the lethal amount needed to kill an average demon, with the poison being strong enough to melt Doma down to his very bones and prevented him from regenerating. Medical Expertise: Despite not being as combat-talented as the rest of her fellow Hashira, Shinobu instead displays immense skill and mastery in over medical and pharmaceutical fields to make up for her lack of natural-born combat ability, being highly knowledgeable about how to create various poisons using wisteria and utilize them in combat to achieve the most deadly effect. She is capable of killing opponents within seconds,[20][21] and even manages to create a poison strong enough to drastically weaken Doma, the second strongest demon of the Twelve Kizuki.[22] She possesses the necessary skills to slowly saturate her body with poison without negatively impending her own health,[23] as well as the medical skills needed to counteract the venoms and poisons created by demons. This is seen when she manages to undo the poison that is slowly transforming Zenitsu Agatsuma into a spider and restore him back to his previous human form.

Anti-Kibutsuji Drug: Upon teaming up with Tamayo and Yushiro, Shinobu was able to aid Tamayo in creating a successful, four-stage drug that would be used to significantly weaken Muzan, even despite his immense physical resistance and abilities.[24] This drug was undeniably one of the biggest factors in the final fight against the Demon King, as it made the normally useless attacks of the Demon Slayers into ones that were super effective, allowing them to drive him into a corner and kill him. Indomitable Will: Shinobu possesses an undaunted spirit and incredible willpower, mostly due to her unquenchable hatred for demons. Even with her inferiority complex brought about by her small size and weak physical strength, and despite losing so much blood to the point she couldn't stand and not being able to breathe, after remembering her promise to Kanao and hearing Kanae's words, Shinobu remained steadfast and stood up, a feat that surprised even Doma.[16]

Keen Intellect: Shinobu possesses vast knowledge and keen observation. During her battle with Doma, she was able to critically analyzing and assessing the Upper Rank's techniques, further deeming that breathing itself was dangerous due to his Blood Demon Art of frozen mist.[17] Additionally, she was able to calculate the amount of poison and the poison mix that would be the most effective against him.[18] After her sister's death, she was able to use what paltry information Kanae gave her to devise a strategy that eventually led to the defeat of Doma. She also developed a form of sign language with Kanao to communicate crucial information in a short span of time, which helped Kanao in fighting and defeating the Upper Rank demon.[19]As a Hashira of the Demon Slayer Corps, Shinobu is a very powerful and skilled combatant.[10] Despite not possessing the physical strength to cut off a demon's head common to that of an average Demon Slayer,[9] Shinobu uses her creativity, ingenuity and other physical abilities to more than make up for it. Instead of the traditional method of decapitating a demon with a Nichirin Sword to kill them, Shinobu opts to use a modified version of a katana that acts as a stinger to inject a powerful wisteria-based poison that is lethal to demons.[11][12] In addition to her intellect, she is extremely fast and agile, allowing her to overpower demons very quickly.[13][14] Her true strength was revealed during her battle with the second most powerful Upper Rank demon, Doma, where she was able to go toe-to-toe with the demon briefly, even managing to outmatch him slightly and received praise from him.)