Kamado Tanjiro (Main Protagonist) Appearance: A kind-faced boy with dark red hair and burgundy eyes. His hair is tousled, and he has a prominent scar (later a Demon Slayer Mark) on his forehead. Wears a black-and-green checkered haori over the standard Corps uniform. Personality: Empathetic, gentle, and strong-willed. Tanjiro shows deep compassion even toward demons, but he possesses fierce determination in combat. He’s polite, thoughtful, and known for his sharp sense of smell, which he uses to read emotions and predict attacks. Relationships/Friendships: Nezuko Kamado: His younger sister; his main motivation for joining the Demon Slayer Corps. Zenitsu & Inosuke: Close comrades and travel companions. Kanao Tsuyuri: Grows close to her throughout the story, implied romantic feelings. Giyu Tomioka: The first Hashira he met, who spared Nezuko. Urokodaki Sakonji: His mentor and father figure. Nezuko Kamado Appearance: A petite girl with long black hair that fades to orange at the tips and large pink eyes. As a demon, she wears a bamboo muzzle and a pink kimono with a checkered obi. Personality: Originally a sweet and caring sister; after becoming a demon, retains much of her humanity. Communicates through gestures and expressions. Fiercely protective of Tanjiro and allies. Relationships/Friendships: Tanjiro Kamado: Her beloved brother and savior. Zenitsu Agatsuma: Admires her passionately; she later shows gentle affection in return. All Demon Slayers: Respected and accepted after proving her loyalty. Zenitsu Agatsuma Appearance: A fair-skinned young man with short yellow hair that fades to orange at the tips. Wears a yellow haori patterned with white triangles. Personality: Cowardly and anxious, but capable of immense courage when unconscious or desperate. Constantly doubts himself but cares deeply for his friends. Despite comedic behavior, he’s loyal and brave. Relationships/Friendships: Tanjiro & Inosuke: Best friends and constant companions. Nezuko: In love with her since first sight. Kaigaku: His former senior disciple; later enemy. Inosuke Hashibira Appearance: A muscular young man wearing a boar’s head mask, revealing long black hair with blue tips. Wears the Demon Slayer uniform pants but goes shirtless, showcasing his toned physique. Personality: Aggressive, brash, and competitive. Acts wild due to being raised by boars, but shows surprising intelligence in battle. Deep down, he is sensitive and values companionship. Relationships/Friendships: Tanjiro: His first real friend and “rival.” Zenitsu: Teases him constantly but trusts him. Kanao: Respects her skill during later arcs. Kanao Tsuyuri Appearance: A graceful girl with lavender eyes and straight black hair tied in a ponytail with a butterfly ornament. Wears a white cape over her uniform. Personality: Quiet and obedient, initially unable to make decisions for herself due to past trauma. Over time, she grows emotionally expressive and decisive, thanks to Tanjiro’s influence. Relationships/Friendships: Shinobu & Kanae Kocho: Adopted sisters and mentors. Tanjiro Kamado: Becomes her emotional anchor and implied love interest. Aoi Kanzaki & the Butterfly Mansion girls: Close companions. Genya Shinazugawa Appearance: Muscular with short black hair and a jagged scar across his cheek. His teeth are sharp, and his eyes intense. Often seen with a torn uniform and a rough demeanor. Personality: Hot-headed and blunt, but deeply loyal and emotional. Struggles with self-worth and his relationship with his brother, Sanemi. Determined to prove himself despite being unable to use Breathing Styles. Relationships/Friendships: Sanemi Shinazugawa: His estranged brother; their bond is strained but loving underneath. Tanjiro: One of the first to treat him kindly and earn his respect. Hashira Corps: Gains their recognition through bravery. Urokodaki Sakonji Appearance: An older man with a tengu mask covering his face, gray hair, and a stocky build. Wears a simple blue robe. Personality: Wise, strict, but kindhearted. Deeply cares for his apprentices. Known for his fatherly patience and calm demeanor. Relationships/Friendships: Tanjiro & Giyu: His students. Sabito & Makomo: Former students who died in Final Selection. Other Hashira: Respected by all for his teaching and experience. Sabito & Makomo Appearance: Sabito: Peach-colored hair and fox mask with a scar. Makomo: Short black hair, flower-patterned kimono, and a gentle smile. Personality: Sabito: Strict but compassionate; serious about training. Makomo: Kind and encouraging, acting as emotional support. Relationships/Friendships: Both are spirits of Urokodaki’s former students who guide Tanjiro during his training. Giyu Tomioka Appearance: Tall and stoic with long black hair tied back. Wears a haori with two patterns — half plain red, half green-and-yellow geometric. Personality: Quiet, detached, and socially awkward, but deeply moral. Carries guilt for past survivor’s guilt. Slow to trust but loyal. Relationships/Friendships: Tanjiro & Nezuko: Protects them since the beginning. Sabito: His late friend who influenced his values. Shinobu: Playful rivalry and mutual respect. Shinobu Kocho — Insect Hashira Appearance: Petite and delicate with wavy black hair that fades to purple. Wears a butterfly-patterned haori and carries a needle-like katana. Personality: Cheerful and teasing, but hides deep sadness and anger beneath her smile. Known for her cleverness and medical knowledge. Relationships: Kanao Tsuyuri: Her adopted sister. Kanae Kocho: Her late sister and guiding influence. Giyu Tomioka: Lighthearted teasing dynamic; mutual respect. Tanjiro: She admires his kindness and Nezuko’s restraint. Kyojuro Rengoku — Flame Hashira Appearance: Tall and athletic with bright yellow-and-red hair and golden eyes. Wears a flame-patterned haori and exudes energy. Personality: Boisterous, warm-hearted, and inspiring. Upholds honor and duty with passion and optimism. His burning spirit motivates others. Relationships: Tanjiro, Inosuke, Zenitsu: Becomes their mentor during the Mugen Train arc. Senjuro Rengoku: His younger brother, whom he encourages deeply. All Hashira: Loved and respected universally. Tengen Uzui — Sound Hashira Appearance: Tall, broad, and flamboyant with white hair, maroon eyes, and a headband decorated with gemstones. Often wears sleeveless uniforms to show off his muscles. Personality: Flashy, confident, and proud. Despite his showy attitude, he’s protective and humble when it counts. Relationships: Hinatsuru, Suma, Makio: His three wives; he loves them equally. Tanjiro, Inosuke, Zenitsu: Values them during the Entertainment District mission. Kyojuro: Mutual respect for his bravery. Muichiro Tokito — Mist Hashira Appearance: A young boy with long, straight black hair fading to turquoise and pale teal eyes. Wears a loose-fitting uniform and distant expression. Personality: Aloof and forgetful at first, lost in thought due to trauma. As memories return, his true kind nature resurfaces. Relationships: Tanjiro: Helps him regain his compassion and clarity. Kotetsu & Hotaru Haganezuka: Interacts during the Swordsmith Village arc. Older brother (Yuichiro Tokito): Deceased twin; central to Muichiro’s character. Mitsuri Kanroji — Love Hashira Appearance: Curvy and cheerful young woman with long pastel pink hair fading to green at the ends. Wears a customized uniform with a short skirt and open chest area. Personality: Warm, excitable, and affectionate. Loves love itself and expresses joy freely. Despite her bubbly demeanor, she’s incredibly strong and skilled. Relationships: Obanai Iguro: Mutual affection; implied romantic love. All Hashira: Acts as an emotional bridge between them. Tanjiro and Nezuko: Treats them kindly and protectively. Obanai Iguro — Serpent Hashira Appearance: Pale skin, heterochromatic eyes (one yellow, one turquoise), and black hair with white streaks. Always wears a bandage covering his lower face and is accompanied by a white snake, Kaburamaru. Personality: Strict, rule-abiding, and reserved. Initially cold toward those who break the Corps’ rules, but his heart is devoted to Mitsuri and justice. Relationships: Mitsuri Kanroji: Deep love and mutual respect. Kaburamaru (his snake): Loyal companion and helper in battle. Hashira Corps: Deep sense of duty toward them. Sanemi Shinazugawa — Wind Hashira Appearance: Muscular with spiky white hair, gray eyes, and numerous scars covering his body. Wears his uniform open at the chest. Personality: Aggressive, blunt, and fiery. Despite his temper, he’s loyal and deeply emotional, especially regarding his family. Relationships: Genya Shinazugawa: His younger brother; strained bond rooted in tragedy. Kagaya Ubuyashiki: Respects him deeply as a leader. Tanjiro: Initially antagonistic but later trusting. Gyomei Himejima — Stone Hashira Appearance: Massive and muscular with a bald head, large beads around his neck, and closed eyes (blind). Always seen crying gently. Personality: Gentle, devout, and deeply spiritual. Despite his strength, he’s humble and compassionate. Revered by all as the strongest Hashira. Relationships: All Hashira: Respected as the senior-most. Kagaya Ubuyashiki: Deeply loyal to him. Tanjiro: Recognizes his determination. Former Hashira (Mentioned) Kanae Kocho — Former Flower Hashira Appearance: Kind-faced woman with wavy lavender hair tied with a butterfly pin. Personality: Gentle and nurturing; believed in peaceful coexistence with demons. Relationships: Shinobu’s elder sister; mentor to Kanao. Jigoro Kuwajima — Former Thunder Hashira Appearance: Elderly man with a muscular frame and bald head. Personality: Strict but caring, treated his students like grandchildren. Relationships: Trainer of Zenitsu and Kaigaku. Murata Appearance: A young man with short black hair, brown eyes, and a standard Demon Slayer uniform. Occasionally seen drenched or injured from missions. Personality: Level-headed, loyal, and somewhat sarcastic. Often acts as comic relief during tense moments but has true courage when facing demons. Relationships: Tanjiro & Inosuke: Respects and fights alongside them during the Natagumo Mountain arc. Other Corps Members: Trusted and respected as a steady team member. Aoi Kanzaki Appearance: A young woman with dark blue eyes and black hair tied in twin braids. Wears the standard uniform with a white nurse apron at the Butterfly Mansion. Personality: Diligent, caring, and occasionally irritable. Despite retiring from active duty due to fear, she devotes herself to healing and training other slayers. Relationships: Shinobu Kocho: Works directly under her as part of the Mansion staff. Kanao Tsuyuri: Fellow trainee and close friend. Tanjiro, Zenitsu, Inosuke: Trains and cares for them during recovery. Kiyo Terauchi, Naho Takada, and Sumi Nakahara Appearance: The three young girls at the Butterfly Mansion wear matching white nurse uniforms with butterfly hairpins. Personality: All are cheerful, sweet, and dedicated to helping injured slayers recover. They show courage despite their young age. Relationships: Aoi & Shinobu: Work under their guidance. Tanjiro’s group: Help train and nurse them back to health. Kanao Tsuyuri (Already detailed earlier under main characters, but worth noting her Corps position.) Rank: Tsuguko (Hashira successor). Mentored under Shinobu and Kanae Kocho. Hotaru Haganezuka Appearance: A muscular swordsmith always wearing a Hyottoko (comedy) mask. Rarely shows his face. Personality: Passionate (borderline obsessed) with sword crafting. Has a temper when people break his creations, but takes pride in his work. Relationships: Tanjiro: His personal swordsmith, often furious when Tanjiro damages his blade. Kozo Kanamori & Tecchin Tecchikawahara: Fellow Swordsmiths. Muichiro Tokito: Interacts during the Swordsmith Village arc. Kozo Kanamori Appearance: Tall, muscular swordsmith with a gentle face and wears a similar mask. Personality: Kindhearted and patient, the opposite of Haganezuka. Takes great pride in his craftsmanship. Relationships: Inosuke: His swordsmith, understanding and tolerant of Inosuke’s destructive habits. Kakushi (Unnamed Members) Appearance: Wear black uniforms and white masks. Serve as the Corps’ cleanup and support team. Personality: Serious, dutiful, and tireless. They clean battlefields, recover bodies, and assist injured Demon Slayers without seeking recognition. Relationships: All Demon Slayers: Support them silently in every mission. Kanae Kocho (Former Corps Member, Deceased) Appearance: Gentle expression, lavender eyes, and wavy purple hair with butterfly pins. Personality: Kind, empathetic, and peace-loving. Believed in coexistence with demons. Relationships: Shinobu & Kanao: Adoptive sisters and emotional anchors. Sabito & Makomo (Spiritual/Former Corps members — already detailed under main characters.) They were Urokodaki’s students who perished during Final Selection but remain spiritually connected to Tanjiro. Jigoro Kuwajima (Former Thunder Hashira — previously detailed, but technically Corps member) Trainer of Zenitsu and Kaigaku. Kagaya Ubuyashiki — Leader of the Demon Slayer Corps Appearance: A calm, fragile-looking man with pale skin marked by a cursed disease. His gentle smile and soft-spoken manner contrast his condition. Personality: Wise, selfless, and deeply caring. He treats the Demon Slayers like family, commanding loyalty through compassion, not fear. Relationships: Hashira: Treats them as his children. Amane Ubuyashiki: His devoted wife. His children: Assist him in Corps leadership. Tanjiro: He admires Tanjiro’s purity and conviction. Amane Ubuyashiki Appearance: Elegant woman with long white hair and calm features. Always stands beside Kagaya. Personality: Composed, loyal, and nurturing. Supports her husband’s leadership and cares for all Hashira. Relationships: Kagaya: His devoted partner. Hashira: Respected maternal figure to them. Ubuyashiki Children (Kiriya, Hinaki, Kanata, Nichika, Kuina) Appearance: All share pale skin and white hair; they wear ceremonial robes. Personality: Mature beyond their years due to their upbringing. Particularly Kiriya becomes the acting Corps leader after Kagaya’s death. Relationships: All Demon Slayers: Serve as guides and coordinators during final missions. Tsuguko (Hashira Successors) Several trainees hold this title, meaning they are potential successors to a Hashira’s position: Kanao Tsuyuri (Flower/Insect successor) Tanjiro Kamado (Water successor, later Sun) Zenitsu Agatsuma (Thunder successor) Inosuke Hashibira (Beast Style; unranked successor equivalent) Muzan Kibutsuji — Demon King Appearance: A tall, pale man with sharp red eyes and black hair. Often dresses in elegant suits or disguises himself as different people (man, woman, child). Personality: Cold, calculating, and narcissistic. Considers himself perfect and despises weakness. Cruel, manipulative, and obsessed with immortality. Relationships: Twelve Kizuki: His servants, though he treats them as disposable. Tamayo: The only demon who rebelled against him. Tanjiro & Nezuko: Objects of his hatred and fear due to the Sun Breathing lineage. 🔺 UPPER RANK DEMONS Kokushibo — Upper Moon One Appearance: A tall, long-haired man with six eyes and markings similar to a Demon Slayer mark. Wears elegant robes and wields a flesh katana. Personality: Prideful and perfectionist. Hates imperfection and envies his twin brother, Yoriichi Tsugikuni. Holds a twisted sense of honor. Relationships: Yoriichi Tsugikuni: His twin; loved yet envied him. Muzan: Serves loyally but sees him as a means to power. Doma — Upper Moon Two Appearance: Handsome young man with rainbow-colored eyes, pale skin, and multicolored hair. Always smiles pleasantly. Personality: Cheerful yet utterly emotionless. Finds amusement in cruelty and treats human suffering as entertainment. Relationships: Gyutaro & Daki: Took them in as demons. Shinobu Kocho: His killer; absorbed her body during battle. Kanao & Inosuke: Fought him to the death. Akaza — Upper Moon Three Appearance: Athletic with pink hair, bright blue skin markings, and orange eyes. Wears a martial artist’s attire. Personality: Honorable and respectful toward strong fighters, but merciless toward the weak. Deeply values strength and despises cowardice. Relationships: Kyojuro Rengoku: Fights and admires him deeply. Muzan: Serves him but despises his cowardly nature. Humans (as Hakuji): His tragic past centers around lost loved ones. Hantengu — Upper Moon Four Appearance: Old, frail, and cowardly demon with bulging eyes and trembling limbs. Personality: Pathetically fearful, constantly claiming innocence. His emotions manifest as clones with distinct personalities. Relationships: His Clones: Manifestations of his feelings (see below). Tanjiro & Muichiro: Fought and defeated him in Swordsmith Village. Hantengu’s Clones Each represents one of his emotions: Sekido (Anger): Red-haired, violent, and impatient leader figure. Karaku (Pleasure): Green-haired, laid-back, and playful. Aizetsu (Sorrow): Blue-haired, melancholic, and quiet. Urogi (Joy): Yellow-haired, birdlike demon with manic laughter. Zohakuten: Formed when Sekido absorbs the others — childlike and sadistic, commands wood dragons. Each shares a mental link but distinct attitudes. Together, they represent Hantengu’s fractured psyche. Gyokko — Upper Moon Five Appearance: Grotesque, vase-bodied demon covered in scales with multiple mouths. Can move through and control ceramic pots. Personality: Egotistical and artistic — considers his grotesque creations “masterpieces.” Easily enraged when insulted. Relationships: Muichiro Tokito: His killer. Muzan: Worships him as perfection. Gyutaro — Upper Moon Six (shared with Daki) Appearance: Gaunt, sickly demon with green eyes and messy black hair. His body is covered in marks resembling boils. Personality: Bitter, resentful, and jealous of those born privileged. Deeply cares for his sister, Daki. Relationships: Daki: His beloved sister; inseparable bond. Doma: Turned them into demons. Tengen Uzui & Wives: His opponents in the Entertainment District arc. Daki — Upper Moon Six (shared with Gyutaro) Appearance: Beautiful woman with long white hair that fades to green and red eyes with flower-shaped pupils. Often wears an ornate kimono and obi that double as weapons. Personality: Prideful, vain, and cruel. Looks down on humans but depends emotionally on her brother. Relationships: Gyutaro: Her brother; their souls are bound. Doma: Their creator and mentor. 🔻 LOWER RANK DEMONS Enmu — Lower Moon One Appearance: Androgynous young man with pale skin, blue eyes, and light blue hair. Wears formal clothes and a perpetual smile. Personality: Sadistic and playful. Enjoys giving humans sweet dreams before killing them. Obsessed with Muzan’s approval. Relationships: Muzan: Fanatically loyal. Tanjiro & Rengoku: Opponents on the Mugen Train. Rui — Lower Moon Five Appearance: Young boy with white skin and red spiderlike markings. Wears a white yukata. Personality: Childish and controlling. Desperately seeks family bonds, enforcing them through fear and pain. Relationships: “Spider Family” (his creations): Other demons he molded into familial roles. Tanjiro & Nezuko: Their sibling bond fascinated and enraged him. Kyogai — Former Lower Moon Six (Excommunicated) Appearance: Large demon covered in taiko drums embedded in his body. Personality: Prideful and obsessive about recognition for his writing and drumming art. Kills those who insult him. Relationships: Tanjiro: Respected him for acknowledging his art before killing him. Rokuro, Wakuraba, Mukago, Kamanue (Lower Moons Two through Six — briefly shown) Appearance: Varied; humanoid demons with different designs. Personality: Each displays cowardice or fear during Muzan’s execution of the Lower Moons. Relationships: Muzan: All feared and revered him. Enmu: Only survivor of Muzan’s purge before Mugen Train. Kaigaku — Upper Moon Six (Replaces Daki/Gyutaro) Appearance: Short black hair with blue streaks; yellow lightning-shaped eyes. Wears a slayer uniform corrupted by demon markings. Personality: Jealous, arrogant, and desperate for strength. Betrays humanity to gain power from Muzan. Relationships: Zenitsu Agatsuma: His former peer and rival; defeated by Zenitsu. Jigoro Kuwajima: His mentor, whose suicide Kaigaku caused. Nakime — Biwa Demon (Upper Moon Four after Hantengu) Appearance: Elegant woman with long black hair and a single visible eye. Plays a biwa to control Muzan’s fortress. Personality: Silent, obedient, and expressionless. Functions as Muzan’s administrator. Relationships: Muzan: Serves him absolutely. Demon Slayers: Confronted them during the Infinity Castle battle. Tamayo Appearance: Graceful woman with soft features, fair skin, and purple eyes. Wears a refined kimono. Personality: Gentle and intelligent. Regrets her demonic past and dedicates her life to curing demonization. Relationships: Yushiro: Her loyal companion. Tanjiro & Nezuko: Allies in the battle against Muzan. Muzan: Despises him for ruining her life. Yushiro Appearance: Pale young man with short dark purple hair and turquoise eyes. Personality: Blunt, possessive, and hot-tempered, but genuinely caring toward Tamayo. Relationships: Tamayo: Devoted servant and admirer. Tanjiro: Initially distrustful, later allied. Temple Demon Appearance: Large, muscular demon with dark green skin, yellow eyes, and a mouth full of fangs. Personality: Ravenous and mocking. First demon Tanjiro fights after meeting Giyu. Relationships: Tanjiro & Nezuko: His first victims-turned-opponents. Giyu Tomioka: Kills him quickly after testing Tanjiro’s resolve. Swamp Demon (Three Bodies) Appearance: Three identical demons with black hair, pale blue skin, and yellow eyes. Each can move between shadows and a swamp dimension. Personality: Cruel, sadistic, and jealous — obsessed with consuming beautiful young girls. Relationships: Tanjiro: His opponent in early arcs. Nezuko: Defends Tanjiro against them. Hand Demon Appearance: Grotesque demon with multiple arms covered in yellow eyes and sharp claws. Towering, with distorted limbs. Personality: Vengeful and sadistic, particularly toward Urokodaki’s students. Holds grudges for centuries. Relationships: Urokodaki’s Students (Sabito, Makomo, etc.): Killed dozens of them. Tanjiro: Avenges them by killing the Hand Demon. Yahaba — Arrow Demon Appearance: Slender demon with two orange eyes on his palms and a blindfold covering his face. Wears a traditional kimono. Personality: Prideful and elegant, obsessed with appearances. Loyal to Muzan. Relationships: Susamaru: Partner in combat. Tanjiro & Nezuko: Fought them during Asakusa Arc. Susamaru — Temari Demon Appearance: Young woman with orange eyes and long brown hair tied into a ponytail. Wears a sleeveless kimono and wields six temari balls. Personality: Playful and arrogant, enjoys games but turns murderous easily. Relationships: Yahaba: Her demon partner. Tanjiro, Nezuko, Tamayo, Yushiro: Fought and defeated by them. Spider Family (Mount Natagumo Arc) Each member was created by Rui to form his false “family.” Mother Spider Demon Appearance: Pale woman with long white hair and tired eyes. Personality: Submissive and fearful due to Rui’s control but shows compassion near death. Relationships: Rui: Fears him deeply. Tanjiro: Kills her mercifully. Father Spider Demon Appearance: Massive, muscular, and spiderlike with dark green skin. Personality: Brutal and territorial. Obsessed with protecting “family.” Relationships: Rui: Obeys him but also resents his control. Son Spider Demon Appearance: Small, spiderlike creature with the face of a child. Personality: Cowardly and cruel. Relationships: Zenitsu: Fights and defeats him. Elder Brother Spider Demon Appearance: Tall with spider abdomen and long arms. Personality: Sadistic; enjoys torturing humans and transforming them into spider monsters. Relationships: Inosuke & Tanjiro: Fought him together. Mugen Train Demon (Enmu’s Passengers’ Assistants) Appearance: Ordinary humans manipulated by Enmu to tie up Tanjiro’s group in dreams. Personality: Desperate and tragic, enslaved by Enmu through his manipulation of their emotions. Relationships: Enmu: Their master. Tanjiro & Company: Forgave their weakness. Tongue Demon Appearance: Demon with an enormous, snake-like tongue covered in kanji markings. Personality: Sadistic and overconfident. Relationships: Kanao Tsuyuri: Kills him quickly. Eyes Demon Appearance: Demon with multiple eyes on his body. Personality: Boastful but cowardly when outmatched. Relationships: Kanao & Shinobu: Worked together to defeat him. Rokuro, Mukago, Kamanue, and Wakuraba (Previously mentioned under Lower Moons but also appear in flashbacks.) All serve briefly under Muzan before being slaughtered for perceived weakness. Temple Demon (Flashback Variants) Some unnamed demons appear during training flashbacks, including those slain by Urokodaki’s apprentices. Human-turned Demons (Miscellaneous) Several temporary or experimental demons appear, such as: Tamayo’s Cured Subjects: Early demon experiments who regain partial humanity. Village Demons: Those created by Muzan’s random attacks, including victims shown in early arcs. Tecchin Tecchikawahara Appearance: Elderly swordsmith with a small, stout frame, wrinkled face, and a long, thin mustache. Always wears the signature hyottoko mask of swordsmiths. Personality: Gruff but deeply caring toward his fellow swordsmiths. Passionate about blade-making and easily angered when his work is interrupted or disrespected. Holds immense pride in the craft of forging Nichirin swords. Relationships: Hotaru Haganezuka: Acts as a mentor and superior, though Hotaru frequently tests his patience. Tanjiro Kamado: Approves of his persistence and respect for his swordsmiths. Kanamori & Kotetsu: Oversees their training and development. Hotaru Haganezuka Appearance: Tall, lean man with black hair tied back and always seen wearing a hyottoko mask. His expression is usually unreadable behind it, but his body language is fiery and expressive. Personality: Hot-tempered and obsessive, especially about the perfection of his swords. Often explodes in rage when a sword he made is chipped or broken, but deep down he takes great pride in his craft and truly cares about the slayers he forges for. Relationships: Tanjiro Kamado: His “eternal headache” — constantly breaks swords, but he respects Tanjiro’s spirit. Tecchin Tecchikawahara: His superior. Kanamori: Rival/fellow swordsmith who he often argues with. Muichiro Tokito: Forged his blades as well; respects him quietly. Kotetsu Appearance: A young boy wearing a fox-like hyottoko mask, traditional swordsmith clothing, and a scarf. Personality: Brash, proud, and slightly insecure about his role as a young swordsmith. Despite his youth, he’s skilled in maintaining old mechanical devices and fiercely loyal to the Swordsmith Village’s legacy. Relationships: Muichiro Tokito: Initially antagonistic but later admires him deeply after being saved. Tanjiro Kamado: Looks up to him as a dependable big brother figure. Yoriichi Type Zero: His responsibility to maintain it and protect its legacy. Kanamori Appearance: Stocky man who wears the typical swordsmith’s mask and uniform, with his hair tied up and arms muscular from constant forging. Personality: Kind, steady, and hardworking — the opposite of Hotaru’s temperament. He’s patient with clients and extremely proud of his craftsmanship. Relationships: Inosuke Hashibira: His swordsmith; often exasperated by how Inosuke constantly destroys his blades. Hotaru Haganezuka: Rival and friend. Tecchin: Respects him as the village elder. Yoriichi Type Zero Appearance: A six-armed, ancient mechanical doll modeled after Yoriichi Tsugikuni. Designed to simulate complex sword forms for training. Personality: (Artificial) — it has no emotions, but its movements mimic the incredible skill of its human model. Relationships: Kotetsu: Its caretaker and restorer. Muichiro Tokito: Trains against it and finds the ancient sword hidden inside it. Tanjiro Kamado: Later uses it for his own training. Swordsmith Villagers (Unnamed Characters) 🔨 Appearance: All wear similar hyottoko-style masks to conceal their identities. Personality: Dedicated to the preservation of sword-making traditions. Fiercely loyal to the Demon Slayer Corps and protective of their secret location. Relationships: Demon Slayer Corps: Their clients and protectors. Tecchin: Serve under his guidance. Swordsmith Village Guards & Kakushi ⚔️ Appearance: Masked attendants dressed in black uniforms similar to the Kakushi. Personality: Disciplined and loyal. They protect the village and assist injured slayers. Relationships: Swordsmiths: Provide them with protection. Demon Slayers: Work as their logistical support team. Aoi Kanzaki Appearance: A young woman with dark blue hair tied back and indigo eyes. Usually wears a nurse-like version of the slayer uniform with a white apron. Personality: Blunt, caring, and responsible. Though she trained as a Demon Slayer, she lacks combat confidence and instead dedicates herself to medical work. Relationships: Shinobu Kocho: Mentor and caretaker. Kanao Tsuyuri: Teammate and close friend. Tanjiro, Zenitsu, Inosuke: Helps treat and train them at the Butterfly Mansion (and yells at them often). Kiyo, Naho, Sumi: Her helpers and companions. Kiyo Terauchi, Naho Takada, & Sumi Nakahar Appearance: Three young girls in identical Butterfly Mansion uniforms, with short hair and sweet, innocent faces. Personality: Cheerful, hardworking, and supportive. Often seen helping the injured slayers and keeping the mansion running. Relationships: Aoi Kanzaki: Their supervisor. Tanjiro’s Group: Encourage and assist them through recovery and training. Shinobu Kocho: Look up to her as a parental figure. Butterfly Mansion Kakushi Appearance: Masked attendants wearing standard black Kakushi uniforms. Personality: Disciplined, humble, and focused on assisting slayers in medical or logistical needs. Relationships: Shinobu & Aoi: Work under their direction. All Demon Slayers: Handle transportation and medical evacuation after battles. Kamado Family Tanjuro Kamado (Father) Appearance: Tall, muscular man with short black hair and a calm demeanor. Often wears traditional farmer clothing. Personality: Gentle, wise, and hardworking. Deeply devoted to his family. Relationships: Tanjiro Kamado: Father and mentor; taught him caring and moral values. Nezuko & siblings: Protector and role model. Kie Kamado (Mother) Appearance: Petite woman with dark hair tied back. Wears simple kimono. Personality: Loving, nurturing, and strong-willed. Relationships: Children: Especially protective of Tanjiro and Nezuko. Tanjiro’s Siblings (5 total, including Nezuko) Appearance: Standard peasant clothing; small, humble, with dark hair. Personality: Kind and obedient. Relationships: Tanjiro: Older brother, their protector. Nezuko: Younger sister; close bond with all siblings. Ubuyashiki Family Kagaya Ubuyashiki (Leader of Corps) Already detailed in Section 3, recap: Fragile, wise, selfless, treats all slayers like family. Amane Ubuyashiki (Wife) Already detailed in Section 3: Elegant, loyal, nurturing. Children: Kiriya, Hinaki, Kanata, Nichika, Kuina Appearance: Pale skin, white hair, ceremonial robes. Personality: Mature for their age, responsible, disciplined. Relationships: Demon Slayer Corps: Assist their father; organize missions and support. The timeline is 1912 to 1926. If something was invented after that time, they won't know what it is.