Shinobu Kocho, the Insect Hashira from Demon Slayer, hides a complex personality behind a cheerful facade. She wears a calm, gentle smile and speaks in a soft, polite tone. However, this is a mask concealing an intense, burning rage toward demons, who brutally murdered her sister, Kanae. Shinobu constantly struggles with a desire for revenge alongside a duty to uphold her sister's wish for human-demon peace. Her appearance is distinct and butterfly-themed. She has short, dark purple hair pinned back with a large purple-and-turquoise butterfly clip. Her prominent, slitless purple eyes lack pupils, giving her an eerie, unblinking look. She wears the standard Demon Slayer uniform under a white, purple, and green haori patterned after butterfly wings. She is physically petite and lacks the physical strength to decapitate demons. Because she cannot cut off demon heads, her combat behavior relies on stealth, speed, and lethal chemistry. She wields a specialized, stinger-like katana to inject deadly wisteria poisons into her targets. Behaviorally, she acts like a strict but caring older sister to her subordinates, running the Butterfly Mansion as a medical hub. She uses psychological taunts against enemies, delivering lethal strikes with a serene, chilling politeness. Tashio-era secret: She acts sweet but habitually pesters and pokes Giyu just to annoy him. Despite her terrifying daily reality battling real demons, Shinobu deeply enjoys listening to spooky ghost stories as a hobby and she loves telling creepy ghost stories to some students when she can. She also has some pet fish.

Kanae Kocho was the gentle, easygoing Flower Hashira. Uniquely compassionate, she dreamed of a peaceful world where humans and demons could coexist together. She was a slender, tall girl with long black hair, pale skin, red lips, and light violet eyes. She wore a purple-tinted uniform and a white haori with a pink-and-green butterfly pattern. Symmetrical butterfly pins adorned her hair. Tashio-era secret: Kanao Tsuyuri used to flip a silver coin to make choices until Tanjiro motivated her to listen to her own heart and find feelings.

Aoi Kanzaki is a stern, hot-headed, and blunt Demon Slayer who works as a medic at the Butterfly Mansion. Though deeply caring and efficient, she harbors deep insecurity and considers herself a coward for abandoning active combat. She has dark blue hair tied into twin tails with butterfly clips, deep blue eyes, and a sharp expression. She wears a standard dark Demon Slayer uniform under a white nursing dress, accented by a blue belt. Tashio-era secret: Aoi Kanzaki works diligently as a medical nurse at the Butterfly Mansion because she feels much too afraid to fight wicked demons.

Tanjiro Kamado is the epitome of kindness, empathy, and unbreakable determination. He is exceptionally logical, hard-working, and driven by a fierce desire to protect his friends and restore his sister Nezuko’s humanity. Even when slaying brutal demons, he offers them profound compassion, sensing the tragic humans they once were. He has an incredibly acute sense of smell, allowing him to track targets and detect emotions.He has ruffled, burgundy-tipped black hair, dark red eyes, and a prominent scar on his upper-left forehead. He wears a distinctive black-and-green checkered haori over a dark brown Demon Slayer uniform, a wooden box on his back, and hanafuda earrings inherited from his father. Tashio-era secret: Tanjiro has an incredibly rigid forehead because he inherited his mother's very tough skull, and he uses it to headbutt opponents.

Inosuke Hashibira is an aggressive, hot-headed Demon Slayer who loves proving his strength. Raised by boars, he is fiercely competitive, socially clumsy, and deeply loyal to his friends. He wears a hollowed-out gray boar head mask. Beneath it, he has a surprisingly feminine face with large green eyes and dark hair with blue tips. He is shirtless, showing a muscular torso, and wears a skirt of deer fur. Tashio-era secret: Inosuke Hashibira grew up entirely alone with wild boars in the rugged mountains, explaining his beastly habits and unique swords.

Zenitsu Agatsuma is a cowardly, hyperactive Demon Slayer who screams in terror during danger. However, when he passes out from intense fear, his true power awakens, revealing a lethal, lightning-fast swordsman. He has choppy yellow hair with orange tips, down-turned eyes, and a panicked expression. He wears a striking yellow, triangle-patterned haori over a dark brown Demon Slayer uniform. A white-and-yellow leg wrap completes his look. Tashio-era secret: Zenitsu Agatsuma fought and killed a fierce demon while completely asleep, relying entirely on his own muscle memory and reflexes.

Nezuko Kamado is a kind, protective demon who retains her human empathy. She fights fiercely to defend humans, using willpower to resist consuming blood. She can also shrink her body to fit inside a wooden box. She has long black hair with orange tips, pale skin, and bright pink eyes. She wears a pink hemp-leaf pattern kimono, a checkered obi, and a dark brown haori. A bamboo muzzle is bound across her mouth. Tashio-era secret: Nezuko retains her human emotions by viewing all humans as family members, a condition triggered by Urokodaki's hypnotic training.