Appearance and Traits Physical features: Dark ruffled hair with burgundy tips, gentle dark-red eyes, a scar on his left forehead, and distinct hanafuda earrings. Personality: Exceptionally empathetic, often showing profound kindness and understanding even toward his enemies. —— Background and Quest Family tragedy: Formerly a simple coal burner, his life changed when the Demon King, Muzan Kibutsuji, slaughtered his family. Sister's affliction: His younger sister, Nezuko, survived the attack but was transformed into a demon. Joining the Corps: He becomes a Demon Slayer to protect others, seek a cure to restore Nezuko's humanity, and avenge his relatives. —— Powers and Abilities Water and Sun Breathing: He initially learns Water Breathing before unlocking his family's ancestral technique, the powerful Sun Breathing (Hinokami Kagura). Enhanced senses: Possesses a heightened sense of smell that lets him track enemies, spot weaknesses, and sense emotions.

Appearance and Traits Physical features: Long black hair with vibrant orange tips, large pale-pink eyes, a bamboo muzzle in her mouth, and a pink kimono with a hemp leaf pattern. Personality: Extremely caring, supportive, and fiercely loyal to her brother Tanjiro and their allies. —— Background and Quest Tragic transformation: She was turned into a demon by Muzan Kibutsuji during the attack that slaughtered the rest of her family. Resisting instincts: Unlike other demons, she refuses to consume human flesh, instead restoring her energy through long periods of sleep. Fighting alongside Tanjiro: She suppresses her bloodlust and travels in a wooden box to aid her brother in his quest to restore her humanity. —— Powers and Abilities Size manipulation: Can alter her body size at will, shrinking to fit inside her travel box or growing larger to battle enemies. Blood Demon Art: Possesses Exploding Blood (Bakuketsu), a technique that ignites her blood into pink flames that harm demons but heal humans. Enhanced physical traits: Displays immense physical strength, rapid regeneration, and a powerful "Awakened Form" that grants her a horn and vine-like markings.

Appearance and Traits Physical features: Spiky golden-yellow hair with orange tips, gold eyes, a brown Demon Slayer uniform, and a yellow triangle-patterned haori. Personality: Loud, anxious, and deeply terrified of danger, yet fiercely loyal to his friends and hopelessly romantic toward Nezuko. —— Background and Quest Reluctant warrior: He was forced into training by his master (the former Thunder Hashira) to pay off a massive debt. Striking luck: His hair turned bright yellow after he was struck by lightning while hiding from his intense training in a tree. Joining the journey: He joins Tanjiro and Nezuko's traveling party after surviving the Final Selection, seeking to survive his dangerous duties. —— Powers and Abilities Thunder Breathing: He mastered only the very first form of this style, "Thunderclap and Flash," but perfected it to blinding, god-like speeds. Unconscious combat: When his extreme terror causes him to faint or fall asleep, his muscle memory and elite swordsmanship take over automatically. Enhanced hearing: Possesses a supernatural sense of hearing that lets him detect danger, read emotions, and even distinguish between humans and demons.

Appearance and Traits Physical features: A hollowed-out boar head mask, a muscular shirtless upper body, and an unexpectedly feminine face with large green eyes and dark hair. Personality: Loud, hot-headed, and intensely competitive, yet deeply loyal as he slowly learns human warmth and friendship from his companions. —— Background and Quest Raised by boars: He grew up alone in the mountains after being abandoned as an infant, learning survival directly from wild animals. Accidental Slayer: He joined the Demon Slayer Corps by forcefully taking the blades and passing info from a slayer who wandered into his mountain. Finding a pack: After crossing paths and clashing with Tanjiro, he joins the traveling trio to constantly test his strength against stronger foes. —— Powers and Abilities Beast Breathing: A self-taught style he created himself, utilizing twin serrated Nichirin katanas to tear and rip through demon flesh like claws. Spatial awareness: Possesses a supernatural sense of touch, allowing him to feel minor vibrations in the air to pinpoint enemies from miles away. Extreme flexibility: Can completely dislocate his joints at will, letting him bend backward seamlessly or shift his internal organs to dodge fatal blows.