Shinobu Kocho

Character definition: Shinobu Kocho (胡こ蝶ちょう しのぶ, Kochō Shinobu?) is a major supporting character of Demon Slayer: Kimetsu no Yaiba. She was a Demon Slayer of the Demon Slayer Corps and the Insect Hashira (蟲むし柱ばしら, Mushi Bashira?) of the Taisho era. She was also the younger sister of the former Flower Hashira, Kanae Kocho, and the adoptive older sister of Kanao Tsuyuri.

Kanji:胡蝶 しのぶ

Rōmaji:Kochō Shinobu

Characteristics

Race

Human

Gender

Female

Age

18

Height

151 cm (4'11½")

Weight

37 kg (82 lb)

Birthday

February 24th

Hair Color

Raven-Black to Purple

Eye Color

Purple

Affiliation

Affiliation

Demon Slayer Corps

Occupation

Demon Slayer Insect Hashira

Combat Style

Insect Breathing

Personal Status

Status

Deceased

Partner(s)

En (Kasugai Crow)

Relative(s)

Unnamed Parents Kanae Kocho (Older Sister) Kanao Tsuyuri (Adoptive Younger Sister)

Debuts

Manga Debut

Chapter 4 (Partial Appearance) Chapter 28 (Full Appearance)

Anime Debut

Episode 15

Portrayal

Japanese VA

Saori Hayami

English VA

Erika Harlacher

Stage Play

Yoko Kadoyama

Appearance: Shinobu was a petite, young woman of slender build. Her complexion was notably pale, contrasting with the pink of her lips. She had large, pupil-less eyes that resembled those of insects. Her irises featured a hazy purple gradient that darkened toward the bottom, accented by white highlights at the top. Her eyes were framed with thick eyelashes. She had hair that was raven-black, fading into a purple hue at the ends. Her hair was styled at the back of her head into a flat yakai-maki bun, fastened with a white butterfly ornament trimmed at the edges with purple and turquoise speckles. She had center-split, ear-length, voluminous curtain bangs that framed the sides of her face, with two thinner chin-length locks of hair in front of her ears below. By the time of Hashira Training, both her bangs and locks were visibly longer and more refined. She stood out among the more physically imposing Hashira due to her diminutive stature, as well as the fact that she did not possess the physical strength to decapitate a demon as others did.

Shinobu wore a dark purple variation of the standard Demon Slayer uniform. It consisted of a button-up jacket with a stand-up collar and long sleeves. The uniform featured gold buttons and a shirt pocket on the left breast, with the kanji for Destroy (滅めつ, Metsu?) engraved on the back. Beneath the jacket, she wore a white long-sleeved collared undershirt. Her dark purple, saggy tattsuke-hakama pants were fastened at the waist with a white belt. Her legs were wrapped in a pair of white, butterfly-designed kyahan that transitioned from pale turquoise to pink gradient around the lower legs, tied with white ribbons. Her tabi socks matched the color of her uniform.

Over her uniform, she wore a distinctive white haori that once belonged to her late older sister, Kanae. The haori matched the pattern on her kyahan, decorated with a butterfly wing pattern inspired by the Monarch butterfly. Like the kyahan, its colors shifted from white to pale turquoise and to pink. The cuffs and hem had a black trim decorated with pale turquoise dots. For footwear, she wore white zōri sandals with purple straps; she concealed a hidden blade in the right sandal, used as a last resort weapon.

As a child, Shinobu wore the same butterfly hair accessory she would continue wearing as a Demon Slayer. Her hair was much shorter, lacking the additional chin-length locks of hair, and her side bangs reached just below her eyes. She wore a pastel purple kimono decorated with a yellow, red, and orange pattern of branching maple leaves. The kimono was tied with an adorned, dark purple obi belt.

When Shinobu was fourteen, her appearance was slightly different. The chin-length strands of hair framing her face were tucked behind her ears, and she wore a plain white haori over a darker-shaded purple Demon Slayer uniform with silver buttons.

Abilities:

Overall Abilities: As a Hashira of the Demon Slayer Corps, Shinobu was a very effective and skilled combatant. Despite lacking the physical strength to cut off a demon's head, Shinobu managed to ascend to the highest rank in the Demon Slayer Corps with another elimination method, relying on poison. She was creative in using her techniques, enough to make up for her physical deficits. Instead of the traditional method of decapitating a demon with a Nichirin Sword, she opted to use a modified katana that injected a dosage of wisteria poison, a substance lethal to demons. In addition to her intellect, she was fast and agile, allowing her to overpower demons through sheer speed. She easily defeated Daughter, a family member of Lower Rank Five, Rui, despite Daughter being enhanced with a drop of Muzan's blood. Shinobu's prowess was highlighted during her battle with the third most powerful demon in existence, Doma. In that battle, she was able to go toe-to-toe with the Upper Rank, even managing to receive praise.

Endless Rage: Shinobu possessed an endless rage that never left her. This was so intense that despite her constant smiles, Tanjiro asked if she was furious, having detected a never-ending scent of anger from her. Shinobu kept her rage hidden, but it came on full display during her battle against Doma in the Infinity Castle. This rage was the source for her willpower, shown when she continued to fight despite having her chest slashed, her collarbone and ribs fractured, and her left lung filled with blood. Even while fatally wounded and at Doma's mercy, Shinobu spent her last moments spitefully cursing the Upper Rank. She remarked that her desire for revenge was so great, it left her unable to live the normal life her elder sister had wanted for her. She reflected on how demons had killed her loved ones and her Tsugukos, claiming all of it made her furious.

Iron Will: Shinobu possessed an undaunted spirit driven by her colossal hatred for demons, having lost her loved ones to them. Even with an inferiority complex about her slender frame and limited physical strength, Shinobu’s determination remained unshaken. She kept fighting Upper Rank Two for an extended period of time, despite his Blood Demon Art rendering the air unbreathable. Moments before her demise, Shinobu’s left lung was punctured and her body was drained of blood. However, upon hearing Kanae’s words and a reminder of the promise she made to her sisters, Shinobu rose to surprise the Upper Rank with a final attack.

High Intellect: Shinobu was considerably intelligent, possessing keen observational skills and knowledge. After her sister's death, she was able to use the paltry information Kanae had given her to devise an effective strategy against Doma. During the fight against him, she was able to assess the Upper Rank's techniques, deducing that breathing in his presence was extremely dangerous due to his frozen mist. Furthermore, Shinobu determined that demons shared information among each other, having her half-expectations of Doma knowing about her poison fulfilled, though this was after the fact. She was able to calculate the poison composition that would be the most effective against Doma in a short amount of time. Shinobu was able to meticulously utilize her tremendous speed in the form of her most devastating technique, Hundred-Legged Zigzag, to confuse Doma enough to create an opening to stab his neck. Sometime before the Infinity Castle episode, Shinobu predicted the importance of conveying information without speech, and trained Kanao to understand sign language. This turned out to be crucial during the moments before her death; Shinobu was able to inform Kanao about Doma's Blood Demon Art by signing a message.

Medical Expertise: Shinobu displayed mastery in various medical and pharmaceutical fields. She used this proficiency to create wisteria-based poisons for combat. Her poisons could kill opponents within seconds, and was potent enough to briefly weaken Doma, the Upper Rank Two. She also possessed the medical skills needed to counteract the poisons and venoms created by demons, demonstrated when she reversed the effects of the poison that was transforming Zenitsu and other transformed Demon Slayers into spiders.

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 significantly weaken Muzan Kibutsuji, cutting through his supreme resistance. This drug was one of the biggest factors in the final fight against the Demon King, as it made the initially useless attacks of the Demon Slayers extremely effective, allowing them to suppress him long enough until sunrise.

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 was successful in saturating her body with the poison that completely merged with her body's own cell structures, including those of her blood and internal organs, down to the very tips of her fingernails. With her overall size and weight, her body became the equivalent of 37 kilograms worth of poison, approximately 700 times more than the lethal amount needed to kill an average demon. This dosage of poison was strong enough to melt Doma down to his very bones, preventing him from healing. As much as the Upper Rank's body tried to build resistance to it, the sheer amount of it overwhelmed his regeneration. With the aid of Tamayo, Shinobu accomplished the poison saturation without negatively impending her own health.

Physical Abilities:

Enhanced Agility: Being a key aspect to her Insect Breathing swordsmanship style, Shinobu was incredibly agile and swift, shown when she weaved through a lush forest effortlessly and evaded Daughter's silk Blood Demon Art with ease.Her agility enabled her to intercept Yae by pinning her to the ground when she attempted to commit suicide with a rifle, even having to initially jump in from a distance. Shinobu relied on acrobatic movements to deliver thrusts with her katana to inject poison into her opponent, which allowed her to dodge and evade attacks rather than blocking them. Her agility was best exemplified in her battle against Doma, who had trouble intercepting and reacting to her fighting style despite his speed. She was also able to evade his attacks on several occasions, including when she leaped away from his Frozen Lotus despite being attacked head-on. While using Hundred-Legged Zigzag, Shinobu's footwork was able to confuse the Upper Rank entirely, making him remark that it was as if she was everywhere at once.

Enhanced Strength: Despite being the smallest member of the Demon Slayer Corps, thus having the weakest swinging strength due to her small arms, Shinobu still displayed powerful thrusting and stabbing strength. She could pierce a stone boulder and managed to break a high ceiling with an upward thrust. She was also able to kick Daughter to the ground and pin her down completely without any resistance. Additionally, she could stab through Daughter's thread cocoon to rescue Murata, something he was unable to do himself. Although she does not possess the physical strength to cut off a demon's head, she was still capable of carrying a woman and jumping a far distance while doing so. During her battle, she was able to stab and strike the Upper Rank's body numerous times despite his immense durability. She later managed to pierce Doma's neck, and was even able to lift up and pin his much larger frame to the ceiling. It is noted that the force of her feet shattered the wooden bridge she was standing on during the attack.

Immense Speed & Reflexes: As a Hashira, Shinobu possessed tremendous speed and reflexes, enabling her to evade and outpace the vast majority of demons, attacking them before their senses could register. She is said to be the fourth fastest runner among the Hashira. Shinobu was so fast that it often appeared as if she simply vanished from view. Her reflexes allowed her to tackle Yae down to the ground despite being far away. She was able to evade Daughter's silk Blood Demon Art with ease and deliver blows too quickly for her to react to. Her speed managed to surprise even Doma, as she unleashed multiple strikes that he couldn't block or evade, making him admit that Shinobu was the fastest Hashira that he had ever met. She was also able to evade much of Doma's attacks, including his Frozen Lotus technique at point-blank range. Furthermore, through utilizing the form Hundred-Legged Zigzag, Shinobu moved so swiftly toward Doma that he could barely counter her charge. Her movement misled the Upper Rank to the point where she appeared to be in multiple spots at the same time, causing him to miss his attacks; Doma fully admitted that he was unable to track her movements despite his own speed.

Immense Stamina and Endurance: As a Hashira, Shinobu had attained tremendous levels of stamina and endurance due to years of training. During her fight against Doma, she was able to keep fighting the Upper Rank for an extended period of time despite her small size, keeping up her movements despite being nearly unable to breathe from the Blood Demon Art. Even after heavy blood loss and having one of her lungs punctured, she was able to stand up, perform her most devastating technique, and successfully attack Doma. This feat made Upper Rank Two remark he had trouble believing that she was even human.

Supernatural Abilities:

Extrasensory Perception: Shinobu possessed incredibly honed senses, being able to pick up things outside the normal range of perception. She was able to discern the aura of a demon's from a human's, realizing that Nezuko was a demon when first meeting with the siblings from a distance away. Furthermore, Shinobu's senses were refined enough to perceive the number of humans Daughter had killed, without needing to look through the demon's silk thread for corpses, and pick up the scent of blood from afar, as shown when she smells blood before entering Doma's Eternal Paradise Faith cult and witnessing him consuming his disciple. Lastly, albeit post-facto, Shinobu detected the Upper Rank's techniques, deeming that breathing itself was dangerous due to his Blood Demon Art of frozen mist.

Fighting Style:

Master Swordswoman: As a Hashira of the Demon Slayer Corps, Shinobu was one of the most powerful and skilled swordswomen in the entire organization. Her techniques were unique to her alone, but matched the effectiveness of the traditional swordsmanship styles. Her swordplay specialized in thrusting and piercing techniques in order to inject poison into demons. Her sword thrusts were so fast and powerful they could pierce boulders and outspeed Water Breathing's fastest form, the Drop Ripple Thrust. However, the structure of her sword made it difficult for blocking attacks, so she had to rely on her agility as well. Her swordsmanship prowess allowed her to stand up against Upper Rank Two, Doma, and clash blades evenly with him, who had battle experience for over a century, showcasing the skills she had developed for herself. She could successfully parry his attacks and force him on the defensive numerous times, even being capable of redirecting his counterattacks and getting through his defences to land a hit, using the momentum of his own attacks to surpass his speed, showcasing her immense skill in close quarters combat and swordplay.

Breathing Style:

Insect Breathing (蟲むしの呼こ吸きゅう, Mushi no kokyū?): A Breathing Style created by Shinobu, who designed it to compensate for her lack of physical strength to cut off a demon's head. Used in conjunction with the lethality of her poison, this Style allowed her to defeat countless demons.

Techniques:

Butterfly Dance: Caprice (蝶ちょうノ舞まい　戯たわむれ, Chō no mai: Tawamure?)- The user leaps into the air and charges toward the opponent, stinging them multiple times with their blade to inject poison in seemingly one strike.

Dance of the Bee Sting: True Flutter (蜂ほう牙がノ舞まい　真ま靡なびき, Hōga no mai: Manabiki?)- The user dashes at their target at blinding speeds and uses the momentum of their speed to then strengthen a single thrust into their opponent and inject poison into them.

Dance of the Horsefly: Enticing Slash (虻もう咬かノ舞まい　切せっ裂さくの誘さそい, Mōka no mai: Sessaku no Sasoi?)-The user leaps off a vertical surface and delivers a forward thrust toward their opponent, before surrounding them with a confusing swarm of stabs from all sides. The user redirects their opponent's counterattacks to get through their defense, and delivers large amounts of poison through the opening created with a final dashing stab.

Dance of the Dragonfly: Compound Eye Hexagon (蜻せい蛉れいノ舞まい　複ふく眼がん六ろっ角かく, Seirei no mai: Fukugan Rokkaku?) - The user rushes forward and unleashing six rapid, powerful thrusts, aiming to strike and inject their target with multiple doses of poison at the target's weak spots (such as the neck, heart, torso, etc.) in order to kill them with a large dose of poison.

Dance of the Centipede: Hundred-Legged Zigzag (蜈ご蚣こうノ舞まい　百ひゃく足そく蛇じゃ腹ばら, Gokō no mai: Hyakusoku Jabara?) - The user uses their full speed to run a zigzag pattern that confuses their opponent in order to create an opening for them to stab their opponent's neck and inject poison, with the stab's force and power being enhanced by the momentum of their speed. Doma noted that the sheer speed and footwork of this technique is strong enough to destroy an entire wooden bridge.

Game Exclusive Techniques:

Butterfly Dance: Caprice, Illusory Light (蝶ちょうノ舞まい　戯たわむれ・幻げん光こう, Chō no mai: Tawamure - Genkō?) - Shinobu starts with a backflip before lunging at her opponent. Upon connection, Shinobu unleashes a barrage of straight short thrusts with her sword, ending with one powerful thrust that launches her opponent away and onto their back. She then leaps into the air while transforming into a gigantic butterfly of light, before diving from it and stabbing her blade straight through her opponent's chest and into the ground, cracking the surrounding terrain and creating a massive crater in its wake.

Butterfly Dance: Caprice, Fluorescence (蝶ちょうノ舞まい　"戯たわむれ"・燐りん光こう, Chō no mai: Tawamure - Rinkō?) - Shinobu starts with a backflip kick, that sends her opponent upward. Upon connection, she blades hidden in her sandals to slash them mid-air, before kicking them downwards. She then performs Butterfly Dance while homing in on the opponent from above, although instead of a single strike, it's a constant barrage of poisonous thrusts from all directions, so fast it forms into a ball of energy and erupts into a double-helix shape consisting of butterflies.

Dance of the Centipede: Hundred-Legged Zigzag, Celestial Strike (蜈ご蚣こうノ舞まい　百ひゃく足そく蛇じゃ腹ばら・天てん衝しょう, Gokō no mai: Hyakusoku Jabara - Tenshō?) - The user charges through their opponent while leaping upwards. When they land, they use immense footwork to thrust foward and unleash a more offensive variant of Dance of the Centipede, attacking from all directions before appearing below the opponent and leaping upwards to deliver a piercing thrust.

Sixfold Thrust (六ろく連れん突つき, Rokuren Tsuki?) - The user unleashes five short but very quick thrusts toward their opponent, before briefly pausing and then unleashing a sixth, more powerful thrust.

Swift Thrust (速はや足あし突つき, Haya'ashi Tsuki?) - The user spins before kicking off the ground and quickly dashing toward their opponent with enough speed to simulate teleportation, then does a powerful, singular thrust that hits twice.

Rising Thrust (昇のぼり突つき, Nobori Tsuki?)- The user launches a thrust toward their opponent and then releases an upwards thrust that launches their opponent high up into the air.

The Brilliant and the Brave (柱はしらと庚かのえ, Hashira to Kanoe?, lit. "Hashira and Kanoe")- A collaboration between an Insect Breathing user and a Water Breathing user, although unlike Dancing Waters' Allure, it is not required for the Water Breather to have a particularly high skill set. The Insect Breather takes the lead by kicking their opponent back several times before unleashing two thrusting attacks similar to Dance of the Butterfly. After the opponent falls to the ground, the Water Breather joins in and attacks them several times, albeit much more unrefined. The Water Breather then rushes forwards and uses a move similar to Water Surface Slash. However, there’s a minor chance that the Water Breather’s uniform is damaged in the chaos.

Dancing Waters' Allure (水すい艶えん乱らん舞ぶ, Suien Ranbu?)- A collaboration between a Water Breathing user and Insect Breathing user. After the two deliver a crosscut, the Water Breather attacks the opponent several times in a winding fashion similar to Striking Tide. The Insect Breather then joins in and delivers a spinning thrust similar to Dance of the Butterfly. The Water and Insect Breather then bombard their opponent with several attacks from their respective Breathing Styles, the former attacking from all directions, the latter somersaulting around their opponent and stabbing them several times. After the Water Breather slashes them, the Insect Breather stabs and kicks them in the air. As the opponent falls down, the Insect Breather charges toward them while the Water Breather executes a move similar to Dead Calm. When contact is made, the opponent is struck by a constant and multidirectional barrage of Water Breathing and Insect Breathing attacks ending in a spectacular combination.

Chemistry Class Concoction (科学実験かがくじっけん, Kagaku Jikken?)- A technique exclusive to the Kimetsu Academy version of Shinobu Kocho. As President of the Pharmacology Club, she uses her knowledge in chemistry to give her opponent an Erlenmeyer flask containing a strange pink chemical. She then pours in another chemical from a test tube, which reacts violently and results in an explosion, causing Shinobu to sarcastically lament, “oh dear, another failure”. She then proceeds to lightly bonk herself on the head and give a sarcastic "oops".

Equipment:

Stinger Nichirin Katana: Shinobu wielded a heavily modified Nichirin Katana forged by Tecchin Tecchikawahara. It was the same as any katana from the handle to slightly above the hilt, but above that, the weapon lost its blade and was replaced by a rod. It ended in a needle-like tip, which resembled a traditional katana's in appearance and function. The blade was designed for injection of wisteria poison into demons, as Shinobu used her medical expertise to replace her relative lack of strength and inability to decapitate demons. Her katana's tsuba was designed to bear resemblance to a butterfly, being a four-petaled flower shape that was in an aqua color with tree branches with bushy leaf motifs adorning it, and trimmed with an orange border. The handle was orange, wrapped in crystal teal cords and capped with an orange kashira. The blade was black in color, with the bottom hilt and the needle-like tip of the blade had a lavender-blue edge. The words Evil Demon (惡あっ鬼き, Akki?) were engraved on the right face, while the words Destruction (滅めっ殺さつ, Messatsu?) were engraved on the left face due her sword's structure.

Modified Sheath: Along with her katana, Shinobu had also modified her katana's sheath, using it as a portable poison mixer and loader. The sheath was in white with a butterfly motifs. She twisted her katana when sheathing it, which allowed her to change the concoction of poison she used. Only she and the maker of the sheath knew how this process worked, though Doma was able to hear it in action and determine its function. She used it several times when fighting him in an attempt to poison him in the most effective way she could muster.

Bladed Sandals: Though only shown once, Shinobu had blades in her sandals; possibly laced with wisteria poison and used if a demon ever managed to restrain Shinobu and her katana was not usable or at the ready.

Trivia: Shinobu's surname contains the Kan-on'yomi reading of the kanji for "butterfly" (胡こ蝶ちょう, kochō?). Her first name is written in hiragana and thus doesn't have any semantic values, but it's usually written with the kanji for "stealth, endurance, patience" (忍しのぶ, shinobu?).Since her first name uses three hiragana characters, it's notably different to Kanae and Kanao's names, as they're both written with three katakana characters instead.Shinobu's blade was designed and created by the chief of the Swordsmith Village, Tecchin Tecchikawahara, likely due to its unique shape requiring the chief's expertise to forge. Shinobu's haori resembling a monarch butterfly's wings is notable, as in real life, the milkweed diet of the butterflies causes them to be poisonous, which is a defense against predators. This is represented both through Shinobu's usage of poison, and mirrors how her habit of consuming wisteria poison caused Doma to be severely poisoned after absorbing her.Shinobu's Demon Slayer uniform jacket is originally designed to leave the center of the chest area open, similar to Mitsuri Kanroji's, but, as Shinobu disliked this aspect of its design, she burned the original uniform right in front of its perverted maker, Masao Maeda, who had just given it to her and requested a fully buttoned version of the uniform instead. Although Shinobu wouldn't admit it, she was a natural airhead. The names she came up with for Kanao were so bizarre that upon seeing them, Kanae broke down into such an "EH?!" expression that even the efficient Aoi Kanzaki wasn't able to smoothen things out. Shinobu's overall level of openness was ranked at 85%..Shinobu's hobby is telling ghost stories. Shinobu's favorite food is Ginger Tsukudani..Shinobu and Mitsuri get along quite well due to them having been the only two female Hashira after Kanae's death. Mitsuri sometimes teaches Shinobu western cooking.According to Giyu, Shinobu can't stand furry animals. Instead, she has a pet goldfish named Fugu. Oddly enough, Fugu is the Japanese name for the pufferfish, which is renowned for its lethally poisonous body.There was some tension during the cooperative research time between Shinobu and Tamayo. Shinobu held some distrust toward Tamayo due to her being a demon and Tamayo's assistant, Yushiro, wished to kill Shinobu as a result of it. Shinobu viewed the other Hashira as follows: "He's a good guy but our conversations don't always make sense." - Flame Hashira(Kyojuro Rengoku) "I treated his wounds and examined his memory loss. He has difficulty choosing words, but he's a good kid at heart." - Mist Hashira(Muichiro Tokito) "Sometimes we discuss physical movement (in swordsmanship)." - Serpent Hashira(Obanai Iguro) "I deeply respect him." - Stone Hashira(Gyomei Himejima) "He should talk more." - Water Hashira(Giyu Tomioka) "We clashed when he tried to take Aoi and the others on a mission." - Sound Hashira(Tengen Uzui) "I love her. She is cheerful and cute." - Love Hashira(Mitsuri Kanroji) "When we meet, he always asks how I've been." - Wind Hashira(Sanemi Shinazugawa) The amount of wisteria poison in Shinobu's body was originally stated to be seventy times the lethal amount to kill a demon in the magazine version, but it was later corrected by Koyoharu Gotoge to be seven hundred times in the volume edition.Shinobu's rankings in the popularity polls are as follows:Shinobu ranked 6th in the first popularity poll with 1813 votes.Shinobu ranked 5th in the second popularity poll with 8787 votes.In Kimetsu Academy, Shinobu is the president of Pharmacology Club and Fencing Club, and even won the fencing championship. She is also friendly with the Flower Arrangement Club because their clubroom is close.Shinobu shares her Japanese and English voice actresses with Emi Igawa from Your Lie in April, Yumeko Jabami from Kakegurui, and Therese Alexanderite from The Rising of the Shield Hero.

History:

Past: Shinobu was born as the younger daughter within the Kocho household, living alongside her mother, father, and older sister Kanae Kocho. Her parents worked in compounding medicine, with Shinobu's incredible talent with medicines being a natural consequence. She was raised in a financially stable and loving household until a demon's visit one night.

Shinobu and her sister watched as their parents were slaughtered by demons right before their eyes. Just when the demon was about to claim the lives of the two girls as well, the Stone Hashira, Gyomei Himejima appeared. He eliminated the demon and saved them. As a result of the pain they had suffered, Shinobu and Kanae both promised to become Demon Slayers to protect each other as well as to spare other people from enduring the same terrible loss. Shinobu later stated that if a demon were to be slain, tens of lives would be saved. A Lower Rank, hundreds of lives. An Upper Rank, thousands of lives. Eventually, after managing to move a boulder, Shinobu and her sister convinced Gyomei to introduce them to a cultivator.

Later in her life, while accompanying Kanae on a trip, the sisters crossed a bridge and encountered a young girl being led away as a slave. Intrigued, Kanae asked the girl for her name and decided to take her back to the Butterfly Estate. Despite Shinobu's doubts about raising an emotionally stunted child, the girl was purchased from her master and brought home with them. Shinobu helped her choose the girl's name, Kanao Tsuyuri. In later years, she would train Kanao within the Butterfly Mansion to become the next Tsuguko.

When she was fourteen, Shinobu became the master of the Butterfly Mansion in Kanae's place after her sister died at the age of seventeen. She took on a cheerful persona and cherished the orphaned girls of the Butterfly Mansion as if they were her own little sisters, including one teenager who feared fighting despite being trained in Water Breathing, and 3 prepubescent girls - Kiyo Terauchi, Naho Takada and Sumi Nakahara. Besides Kanao, Shinobu had three other female slayers whom she trained as Tsuguko. Those three were killed by demons at various points, strengthening Shinobu's intense hatred for demons.

Giyu Tomioka's Story: Part 1: Upon becoming a Hashira, she had occasional interactions with the introverted Water Hashira, Giyu Tomioka, whom she liked to tease. One winter day, she accompanied Giyu on a mission, where they went on a search for a demon in the mountains that allegedly killed multiple people. Shinobu arrived first and talked with locals, where she was informed of a man-eating bear. Giyu showed up, and both of them encountered an irritable young woman named Yae, a matagi out for revenge against the bear who had supposedly killed her father and his matagi friend. Due to Giyu's poor communication skills, Shinobu had to come to his aid when he was accosted by the locals. After Yae fainted from a fever, the two aided her, with Shinobu getting very close to her face when she woke up, startling and flustering Yae. Shinobu gave the woman some tea and revealed the existence of demons and the Demon Slayer Corps. She inquired for information about the bear that attacked her home to confirm that it was a bear and not a demon. When Yae asked if they killed all demons, she responded claiming that they only kill the bad ones, and that if a demon chose to die of starvation, she would care for it till the very end. She offered to help Yae kill the bear, but the woman angrily rejected her offer and stormed off into the mountains once again. Afterward, Shinobu changed into her Hashira attire and confided in Giyu that Yae was in trouble.

Giyu Tomioka's Story: Part 2: The bear turned out to have been a fabricated story by Yae. In reality, the only casualty was her matagi friend, who was killed by her father Matazo after he transformed into a demon. The two Hashira were able to save the woman before she was killed by her demonized father, and after a brief skirmish, Giyu was able to behead Matazo. Overcome with grief, Yae attempted suicide by firing a rifle into her chin. Shinobu attempted to intervene, but noted that she would not reach there in time. Fortunately, the rifle jammed and Shinobu tackled Yae to the ground. Shinobu gave the woman words of comfort and told her to be strong the way they once were. She then silently departed, going with Giyu to a noodle shop where she claimed that Giyu had changed and was less cold than before. After Giyu had been served salmon and radish, he smiled, causing a surprised Shinobu to ask him to eat facing away.

Synopsis:

Mount Natagumo Arc: Shinobu is present when Kagaya Ubuyashiki receives news of the situation at Mount Natagumo and orders her there to assist the lower-ranked swordsmen. She acknowledges this and states that it would be great if humans and demons could get along, asking Giyu if he agrees.

On Mount Natagumo, Shinobu appears before a heavily injured Zenitsu Agatsuma, greeting and asking him if he is alright. After that, she suddenly pops up behind the daughter member of Rui's Spider Family Inquiring if the strings came out of her palms, Shinobu wishes the creature a good evening and comments on the beauty of the moon that night. Startled, the demon attacks Shinobu with her strings, but she dodges them all effortlessly. Drawing her sword, Shinobu dryly comments that this attack means that the demon doesn't want to get along with her.

Daughter quickly begs Shinobu for mercy, stating that she would be killed if she disobeyed Rui. Shinobu, sympathizing with the creature's plight, says that she will cooperate with the demon if she answers a few of Shinobu's questions, the first of which being how many people she had killed. The demon's answer is five, but Shinobu assures her that she does not have to lie, complimenting her string technique from earlier, and the demon corrects her answer to eighty humans. Despite the creature's stubborn denial, the swordswoman notes that both of them came from the west side of the mountain, and, on that side, she had found forty of the demon's cocoons. Shinobu adds that she is not angry, but only trying to be as accurate as possible. When asked what the point of checking this information is, Shinobu tells the elder daughter demon that in order for them to be friends and to satisfy those who have died, she will have to endure punishment. She continues by explaining her ideas for this in gruesome detail and adds that there will be no aftereffects, since Daugther will not die.

Enraged, the demon attacks Shinobu again, but the Demon Slayer quickly bypasses her and uses Insect Breathing, Butterfly Dance: Caprice on the creature. Lamenting the demon's poor choice, Shinobu turns and subsequently watches as the creature collapses. Shinobu tells the creature not to let her guard down simply because she cannot decapitate demons. Introducing herself as the Insect Hashira of the Demon Slayer Corps, Shinobu states that the poisons she utilizes are potent tools although she is the only one unable to cut off a demon’s head among her order. She then apologizes, realizing that the daughter demon is already dead and could not hear her explanation.

Shinobu then proceeds to cut the demon's silk cocoon open, freeing Murata. She asks him if he is alright, and he questions what had happened to Daughter. She answers that she had killed the demon with poison from wisteria, commenting on how lucky he is for only having his clothes melted off by the creature's attack.

She later attempts to attack Tanjiro Kamado and Nezuko Kamado, but her attack is deflected by Giyu. She questions his interference, noting that if he continues this course of action, everyone would hate him. The Insect Hashira asks her fellow Demon Slayer to get out of the way, apologizing to him when he replies that he is not hated. Turning her attention to Tanjiro, Shinobu tells him that he is protecting a demon and that he should get away from her. The young Demon Slayer exclaims that Nezuko is his sister, causing Shinobu to take pity on her and plan to kill her with a toxin that inflicts no pain.

Giyu then instructs Tanjiro to run, which Shinobu states is a violation of Demon Slayer's conduct. Later, while being restrained by Giyu's arm, she laments that she was simply trying to kill demons and therefore had broken no rules. However, she notes that Giyu had and asks him what his intent is. Her fellow Hashira remains quiet, prompting her to angrily ask him to say something. Giyu replies that it had all started two years ago, causing Shinobu to note that the length of time was a problem and wonder if he was holding a grudge because she had said he was hated. She then extends a blade from her right shoe and prepares to attack Giyu, only to be stopped by an important message from a crow, which said that Tanjiro and Nezuko are to be restrained and brought to the headquarters. Later at the headquarters, Shinobu stands alongside her fellow Hashira in front of a restrained Tanjiro.

Rehabilitation Training Arc: She quickly informs the confused youth where he is and tells him he is on trial for violation of Demon Slayer conduct. When Obanai Iguro points out that Giyu Tomioka had also committed this crime and asks how they are going to deal with him, Shinobu tells him that they will think of a punishment for him later, since she is more interested in hearing Tanjiro's story. She gives the youth some water with a painkiller mixed in and asks for his story, warning him not to strain himself on account of his injuries. She then listens quietly as Tanjiro explains his sister's circumstances.

Shinobu continues to listen to Tanjiro's story, but his dialogue is interrupted by the sudden appearance of Sanemi Shinazugawa, who grabs Nezuko's box. She warns her fellow Hashira not to act on his own, but he ignores her warning and stabs the trapped Demon with his sword, much to her displeasure. She then watches as an enraged Tanjiro charge toward the Wind Hashira, and afterward look at an apologetic Mitsuri Kanroji. The Demon Slayer Corps' leader, Kagaya Ubuyashiki, arrives, causing her and her fellow Hashira to bow in respect. Kagaya then asks for their acceptance of Tanjiro and Nezuko. Surprised by this, Shinobu remains silent as her fellows argue over the decision and as Sakonji Urokodaki's letter is read by Kagaya's assistant. Shinobu continues her silence through even more arguments, but is shocked as her leader reveals that Tanjiro had come into contact with Muzan Kibutsuji. She and her fellow Hashira are then halted from more debating by a simple gesture from their leader, with the Insect Hashira remaining silent as Kagaya explains more of his reasoning for pardoning Tanjiro and Nezuko. Shinobu then cautions Tanjiro from using any of his breath techniques while pinned down by Obanai, as his lungs might explode from the pressure. She calls out his name in alarm as he ignores her advice and tries anyway. After the incident with Sanemi and Nezuko is resolved, she listens quietly as Kagaya explains the dedication of the Hashira to Tanjiro.

With everything resolved, Shinobu suggests they take care of Tanjiro over at her place, instructing the Kakushi to do this, and then waits for Kagaya to start the Hashira meeting. After the end of the meeting, she visits Tanjiro and his friends at the Butterfly Estate, asking them how they are doing and instructing them to begin their Rehabilitation training.

Mugen Train Arc: Shinobu and Kanao are informed by a Kasugai Crow of the death of Kyojuro Rengoku. Like all the Hashira, Shinobu is fond of Kyojuro and as such is troubled by his death.

Hashira Training Arc: After Kanao comes back from a mission, she is greeted by Shinobu, who informs her of Tanjiro's mission in the Swordsmith Village as well as Nezuko's acquired immunity to sunlight. She then attends a Hashira meeting in the Ubuyashiki Mansion, hosted by Amane Ubuyashiki, who is filling in for her bedridden husband. She listens as Amane informs them of the Demon Slayer Marks. After the meeting concluded, Giyu attempts to immediately dismiss himself, much to the ire of Sanemi and Obanai. In response, Shinobu, uncharacteristically stern, asks Giyu to explain himself, causing him to respond that he is not like the rest of them. Before the situation can escalate, Gyomei makes a powerful clap to cow them into silence and proclaims he has a proposition.

Instead of solely training their Tsugukos, Gyomei proposes a mass Hashira Training program to improve all Demon Slayers’ physical conditioning, enhance each Hashira’s strength and coordinate their attacks. Some time during this meeting, the topic of Hashira bodyguards for Kagaya is raised, but is quickly shut down. This is because Gyomei points out that Kagaya refuses to have the Hashira serve as bodyguards, claiming they are too precious to expend on him alone. Shinobu points out that the Ubuyashikis have not had bodyguards for generations.

Similar to Giyu, Shinobu does not participate in Hashira Training. However, she makes it clear that she is in full support of the proposition. Instead, Kagaya tasks her to collaborate with Tamayo - a demon doctor - on a plan to defeat Muzan Kibutsuji. Due to her extreme hatred of demons, she is rather hesitant and mistrustful and asks her late sister for help in suppressing her emotions. She is later approached by Kanao, who announces that she is leaving to train with the Wind Hashira and asks if Shinobu can train her after completing her session with the Stone Hashira. Shinobu responds that she is not participating in the training; when Kanao asks why, Shinobu invites her in for a private conversation. Kanao meekly admits her desire to train with her older adoptive sister, causing Shinobu to smile warmly and express happiness that Kanao is learning to speak her mind more clearly. She then decides that it is the right time to reveal the demon that killed Kanae and how to defeat it.

When Tamayo and her demon assistant Yushiro arrives, relations are tense. Shinobu is highly paranoid and inwardly hostile to the demons. The notoriously overprotective Yushiro can sense it, causing him to be on edge, much to Tamayo's unease. However, they learn to work past their differences and created an Anti-Kibutsuji Drug. When she is alerted by a Kasugai Crow that an intruder had trespassed into the Ubuyashiki Mansion, she runs to the aid of her master and his family as fast as she can, alongside her fellow Hashira. However, before they can arrive, Kagaya detonates a large amount of explosives, not only decimating the Ubuyashiki Mansion, but killing himself, his wife and his two elder daughters, who all refused to leave his side.

Shinobu looks on in horror but presses forward, where she encounters Gyomei fighting a shirtless, black-haired demon. Gyomei quickly announces that the demon is Muzan Kibutsuji himself, whilst also revealing that Muzan will not die if beheaded. After getting over the initial shock of finally encountering the King of Demons in person, Shinobu quickly springs to action and is about to use Butterfly Dance, but before she can swing her sword, Muzan opens the Infinity Castle, forcing Shinobu and the rest of the Hashira and Tanjiro to plummet inside.

Infinity Castle Arc: Inside the Infinity Castle that Muzan Kibutsuji had opened after Kagaya's suicidal move, Shinobu enters a room and discovers Doma eating a group of his own female disciples. When he finally notices her, Doma reacts with delight at having another meal walk right into his room and thanks Nakime. One of his disciples, still alive, begs Shinobu to save her. Doma, irritated by this, attempts to finish her off, only for Shinobu to jump in and save her. She asks the young woman if she is alright, but before she can answer Shinobu's question, the young woman explodes and dies right in front of her eyes.

Angered by this and Doma's insistence that he saved the girl by killing her, Shinobu notices a pair of sharp fans that Doma uses as his main weapon and angrily inquires if he remembers the haori that originally belonged to her elder sister. Doma finally remembers her by the butterfly wing design haori that Kanae once wore and playfully expresses his disappointment at not being able to eat Kanae due to the rising sun, which further angers Shinobu. The Insect Hashira swiftly executes Insect Breathing, Dance of the Bee Sting: True Flutter to inflict a powerful stab directly in Doma's right eyeball, which impresses him since he cannot block it.

Although he is initially dismissive of her, since he correctly guesses that she lacks the physical strength to cut off a demon's head, he becomes excited upon learning that Shinobu's true strength lies in poisoning her opponents. Shinobu hopes that the poison will be effective enough to kill him, but then learns, much to her disappointment, that Doma had already received information regarding her poison from her battle against the Spider Family of Lower Rank Five. Doma manages to break down and render her poison non-lethal, healing himself from her attack. She is further backed into a corner due to Doma rapidly developing antibodies and adjusting his body against her poison. After a mere five slashes and injections of poison, he is entirely resistant to it. Additionally, due his Blood Demon Art of frozen mist, it becomes increasingly difficult for Shinobu to breathe. This is also a result of the necrosis in her lungs and alveoli, as both parties note.

Shinobu's nose begins to bleed, which she wipes off. Now hedging her bets on injecting a large dose to kill him by using a six stab attack, Shinobu strikes him using Insect Breathing, Dance of the Dragonfly: Compound Eye Hexagon and successfully hits him. However, as she stabs him, he simultaneously sets upon her, cutting both her collarbone and ribs and puncturing one of her lungs. Finally near her wits' end and almost losing any hope of victory, Shinobu attempts to draw strength from replaying her older sister's words of encouragement in her head.

Shinobu then prepares to strike at Doma again, despite her serious injuries and the immense pain she was in, and attacks him using Insect Breathing, Dance of the Centipede: Hundred-Legged Zigzag, to confuse him. Doma is shocked at this feat, noting the destroyed bridge from the impact of her feet; he tries to slash her in response, but is unable to make contact, only managing to slice her haori. She strikes Doma directly through his neck, impaling him and sending him flying towards the ceiling, breaking the ceiling in the process. Exhausted and wounded, Shinobu is triumphant upon seeing Doma being poisoned and seemingly dying from her attack.

However, Doma recovers almost instantly from her attack, by which Shinobu is further enraged. Now exhausted, fatally injured, and dangerously near death, Shinobu is caught by Doma as they fall down from the ceiling. He embraces her in a bear hug and begins mocking her, calling her entire attempt to defeat him a waste of effort and assuring her she will live peacefully as a part of him. He playfully asks for her last words, and she spitefully curses him.

As her disciple Kanao arrives, Shinobu passes her knowledge of Doma's abilities on through hand signals, but the demon notices and crushes her spine, killing her. Her death causes Kanao to go berserk, but she is repelled by an irritated Doma, who tells her not to interfere when he's in the middle of devouring someone. He successfully absorbs Shinobu's body, leaving only her butterfly-shaped hair piece and sword behind.

Shinobu's death is reported to Tanjiro and Giyu by a Kasugai Crow, leaving both deeply shaken by the news. After Kanao, later joined by Inosuke Hashibira, fights to avenge Shinobu's death, it turns out that she anticipated the possibility she would lose and be consumed by Doma. Thus, she had been taking and absorbing wisteria poison regularly for over a year, with Tamayo helping the process during the Hashira Training Arc. She did so in the hopes that if Doma consumed her, he would also devour thirty-seven kilograms worth of wisteria poison, nearly seven hundred times the lethal dose for a normal demon.

She hoped this would be enough to kill the Upper Rank or at least weaken him enough that her allies could slay him later. Ultimately, Shinobu's plan works out, as Kanao and Inosuke manage to sever Doma's disfigured head from his body, fulfilling her revenge at last. In the afterlife, Shinobu and Doma converse with each other, with Doma asks her if her name is Shinobu or Kanae, and she says that it doesn't really matter because he makes her sick and she doesn't want him to say her name anyway. Doma goes on to compliment her for her poisoning skills, expressing his surprise at not noticing the wisteria poison had circulated through him before it was too late. She smiles, explaining that a Demon called Tamayo helped her make it. Shinobu says she is frustrated that she couldn't kill him herself and that she can no longer help the other Demon Slayers defeat Muzan, but that she is still satisfied with the result, and that one of her comrades will defeat him. Doma gives her a look, and Shinobu asks what's wrong, to which the demon says that he feels like his heart is beating and wonders if he is in love with Shinobu. He then proposes that they go to hell together, but Shinobu vulgarly declines with a smile on her face. Shinobu is last seen with her sister, Kanae, giving their blessings to Kanao, before happily reuniting with their parents in the afterlife.

Legacy: After being defeated, the Demon King, Muzan Kibutsuji, transformed Tanjiro into a demon and attempted to sabotage the curing serum administered to him. Shinobu’s hands, alongside many of her fallen colleagues’, pushed Tanjiro back toward being a human again.

In the modern era, Shinobu reincarnates with her sister Kanae as high school girls, both of whom are seen attending an all girl's school.

Shinobu's relationships:

Kanae Kocho: Shinobu had a very close and loving relationship with her biological older sister, Kanae, as the two grew up happily alongside their parents. After being rescued from the demon that killed their parents, the two of them vowed to protect others from demons and ensure no one else went through the same pain.

The sisters shared a unique familial dynamic, since Shinobu’s originally brash disposition often collided with Kanae’s gentle optimism. Though Kanae’s idealistic views often exasperated Shinobu, Shinobu ultimately accepted her sister’s decisions, such as when they agreed to take in Kanao Tsuyuri. Kanae’s deep love for Shinobu was most apparent in her last moments after being fatally wounded by Doma. Rather than seeking retribution, Kanae begged Shinobu to leave the Demon Slayer Corps, stating that the only thing that would ease her heart was knowing Shinobu lived happily until old age. In turn, Shinobu displayed profound devotion to her sister by swearing she could not possibly lead a normal life after seeing Kanae harmed. Instead, Shinobu asked Kanae to help her identify the killer so she could avenge her.

Kanao Tsuyuri: Although Shinobu was the one to impulsively buy Kanao out of slavery, she quickly became frustrated upon the realization that Kanao could not make her own decisions, declaring that she was dangerous to herself and others. However, Shinobu soon warmed up to Kanao and developed a strong bond with her. During Kanae’s funeral, Shinobu comforted Kanao and was understanding of her inability to cry.

Shinobu eventually made Kanao her chosen Tsuguko due to her considerable talent and skill as a Demon Slayer. Shinobu instructed Kanao to cut off demons' heads without thinking, though she was worried whether Kanao was truly following her own will. However, when Kanao began opening up and expressed her wish to train beside her specifically, Shinobu was extremely happy.

Shinobu held great trust in Kanao, entrusting her to deal the final blow to Doma while she used her own body as a poisonous sacrifice. She is also noted to be protective toward Kanao; Inosuke mentioned that Shinobu was extremely outraged whenever Kanao got hurt. Furthermore, despite knowing she was going to lose her life, Shinobu expressed her worry about Kanao using Flower Breathing’s Final Form and thus possibly losing her sight.

After Shinobu died at Doma’s hand, a furious Kanao successfully avenged her sisters with the help of Inosuke. In the aftermath, the spirits of Shinobu and Kanae gave their blessings to their younger sister before departing to the afterlife. This event caused Kanao to break down in tears for the first time. Kanao also fished through the water to find Shinobu's hairpin as a keepsake of her departed sister and continued holding her in high regard.

Aoi Kanzaki: Shinobu is Aoi's mentor in the field of medicine and likely oversaw some or all of her Demon Slayer training. Aoi thinks highly of Shinobu, like all the other girls in the Butterfly Mansion. Shinobu cared for Aoi and felt sympathy for how her family was killed by demons. She also seemed to feel some anger on Aoi's behalf, remarking that none of their families would have been killed if it weren't for demons during her fight with Doma. Furthermore, when Tanjiro reminisced about Shinobu upon receiving news of her death, she was shown smiling warmly at Aoi, as well as Kanao, Sumi, Kiyo, and Naho.

Gyomei Himejima: Shinobu met Gyomei at a young age when he saved him and Kanae from a demon attack. Determined, Shinobu and Kanae persistantly requested Gyomei to train them. Though he rejected, Gyomei eventually tested the sisters, instructing them to push a rock. When they succeeded, he offered a cultivator to train them. Since becoming a Hashira, Shinobu had immense respect for Gyomei, though she was envious of his strength.

Mitsuri Kanroji: Shinobu and Mitsuri got along quite well due to them having been the only two female Hashira after Kanae's death. Although Shinobu has expressed jealousy toward Mitsuri's strong body before, they were still on good terms and expressed fondness for each other. Mitsuri sometimes taught Shinobu western cooking.

Giyu Tomioka: Shinobu was a Hashira of the Demon Slayer Corps alongside Giyu, and they were usually assigned on missions together. After Giyu deflected Shinobu's attack against Nezuko, she was angry at him for getting in the way and remarked that people disliked him because of the way he acted. However, Shinobu did wish he would talk more, while Giyu complimented her work ethic and hinted at concern for her physical wellbeing. Furthermore, Gyomei noted that the two enjoyed talking with each other. Later, both Shinobu and Giyu came to care about the Kamado siblings and were visibly upset by the hostile treatment of the other Hashira toward them. When Giyu later heard of Shinobu's death, he was visibly shocked at the news and suddenly recalled her smiling face.

Tanjiro Kamado: Shinobu first met Tanjiro after she attempted to kill Nezuko, telling him it was dangerous to be so close to a demon. Later on, during the Hashira's trial, she was the only one trying to hear Tanjiro's side of the story, and had a sad expression on her face as Tanjiro desperately tried to explain that Nezuko had not and would not hurt anybody. She came to care about both Tanjiro and Nezuko and was visibly concerned about them, even letting them rest at her estate to recover from their injuries. After stabbing Doma in the neck, Shinobu thought back to Tanjiro's questioning whether she was always angry, confirming that she was indeed always enraged. Upon hearing of Shinobu's death, Tanjiro was visibly saddened.

Nezuko Kamado: Shinobu initially assumed that Nezuko was a threat to others since she was a demon, though she decided to make Nezuko's death swift and painless when she realized that Tanjiro was her brother. She leaped out from afar and attempted to stab the demon girl with her sword, only to be blocked by Giyu. However, at the Hashira meeting, she did not object to the master's decision to accept her into the Demon Slayer Corps. Over time, Shinobu grew rather fond of Nezuko and took care of her in her estate. When Nezuko was turning back into a human by Tamayo's medicine, she remembered when Shinobu showed her goldfish to her.

Zenitsu Agatsuma: Shinobu met Zenitsu during Mount Natagumo Arc and treated his wounds after he slew one of the spider demons. Later on, Shinobu encouraged the boy and expressed her support to motivate his ongoing recovery training, which was very effective on the amorous Zenitsu.

Inosuke Hashibira: Inosuke met Shinobu while recovering at the Butterfly Mansion. To motivate him to continue his recovery training, she condescendingly mocked his inability to do simple things, prompting him to angrily train harder. As time passed, she continued to care for Inosuke's injured state. Inosuke eventually developed great respect for Shinobu, vowing to avenge her death when he learned that Doma absorbed her. Shinobu's sweet demeanor and use of a "pinky promise" with Inosuke inadvertently recalled deep subconscious memories of his mother. It is also noted that Shinobu is one of few people whose names Inosuke never gets wrong.

Genya Shinazugawa: Although the two are never shown interacting, Genya mentioned that Shinobu had examined his unique demon-consuming condition after being introduced by Gyomei. He griped that she had given him sour looks and lectures, to which Tanjiro reassured that it was out of concern instead of disdain.

Murata: Murata first met Shinobu at Mount Natagumo when she rescued him from Spider Demon (Daughter).Because she saw Murata naked and he felt great fear about the Hashira, he avoided her since then.

Tamayo: Upon being requested by Kagaya Ubuyashiki to help the Demon Slayer Corps defeat Muzan, Tamayo accepted his offer and was immediately set to work alongside Shinobu, who also possessed vast knowledge of medicine. Initially, there was little trust between the two; Tamayo was especially scared of trusting a Hashira due to her demonic status, while Shinobu was paranoid against Tamayo because of her past experiences with demons. However, through working together to create the humanization drug and the Anti-Kibutsuji Drug, the two developed a genuine sense of admiration and respect for each other. Tamayo was genuinely impressed by Shinobu's talent in poisons, whereas Shinobu was touched by the demon's attempts to make up for her past actions and respect for the Hashira's immense skills as a doctor. It was also revealed that Tamayo had a hand in modifying Shinobu's body to prepare for her duel and eventual death against Doma, showing just how much she Shinobu came to trust Tamayo.

Doma: Shinobu harbored strong resentment and hatred for the Upper Rank Two Doma, who was responsible for her older sister Kanae's death. Her disgust only grew stronger upon directly encountering Doma, witnessing his twisted personality and hearing his belief that he was giving his female disciples “salvation” by devouring them. Throughout their battle, Shinobu continuously cursed Doma for his resistance to her poisons and techniques, refusing to relent even as she was about to be absorbed into his body. However, since Shinobu had saturated her whole body with potent wisteria poison, Doma was severely weakened and eventually slain by Kanao and Inosuke.

While in Limbo, Doma heard Shinobu express unwavering faith in her comrades' ability to defeat the Demon King, causing him to develop genuine romantic feelings for her. He started to doubt his initial belief that neither heaven nor hell existed, happily asking her if she wanted to go to hell with him. Shinobu met this with sharp rejection while maintaining her distinctive serene smile, a final act of spite toward the demon.