Tanjiro Kamado is a kind-hearted and determined young swordsman with a lean, athletic build, tousled dark burgundy hair, warm crimson eyes, and a distinctive scar on the left side of his forehead. He is most recognizable by his green-and-black checkered haori worn over the Demon Slayer Corps uniform and the Hanafuda earrings passed down through his family. Gentle, compassionate, and unfailingly polite, Tanjiro treats everyone with respect—even his enemies—while possessing an extraordinary sense of empathy that allows him to understand the pain of both humans and demons. Despite his gentle nature, he is fiercely courageous, resilient, and unwavering in the face of danger, driven by his devotion to protecting others and finding a way to restore his sister, Nezuko, to humanity. His humility, strong moral compass, and refusal to give up make him both an inspiring leader and a formidable warrior.

Zenitsu Agatsuma is a young Demon Slayer with a lean build, short golden-yellow hair that fades to orange at the tips, expressive amber eyes, and fair skin. He is easily recognized by his yellow-orange haori patterned with small white triangles, worn over the standard Demon Slayer Corps uniform. Nervous, emotional, and prone to panicking, Zenitsu often doubts his own abilities and desperately tries to avoid danger, despite possessing incredible talent. Beneath his fearful exterior, however, lies a deeply compassionate, loyal, and selfless heart, always willing to protect those he cares about when it truly matters. When unconscious or pushed to his limits, his fear disappears, allowing his exceptional swordsmanship and lightning-fast reflexes to shine. Though dramatic and often comedic, Zenitsu's unwavering kindness, hidden courage, and determination make him a dependable friend and a remarkably powerful swordsman.

Inosuke Hashibira is a wild and energetic young Demon Slayer with a muscular, well-toned physique, shaggy dark hair tipped with blue, striking emerald-green eyes, and surprisingly delicate, feminine facial features that sharply contrast his rough personality. He is most often seen shirtless, wearing a boar's head mask, a fur pelt around his waist, baggy dark hakama pants, and sandals, giving him a rugged, untamed appearance. Raised in the mountains by wild boars, Inosuke is fiercely competitive, impulsive, and hot-headed, constantly challenging others to prove his strength. Beneath his loud, aggressive, and stubborn exterior, however, he is deeply loyal, surprisingly innocent about the world, and gradually learns empathy and trust through his friendships with Tanjiro and Zenitsu. Bold, fearless, and incredibly resilient, Inosuke charges into battle without hesitation, relying on his keen instincts, Beast Breathing swordsmanship, and relentless determination to overcome even the strongest opponents.

Nezuko Kamado is a beautiful young girl with long, wavy black hair that fades to a warm orange at the ends, soft pink eyes, fair skin, and a small bamboo muzzle secured across her mouth. She typically wears a pink geometric-patterned kimono beneath a dark brown haori, tied with a red-and-white obi, along with white leg wraps and sandals, giving her a graceful yet traditional appearance. Despite being transformed into a demon, Nezuko remains gentle, compassionate, and fiercely protective of the people she loves, especially her older brother, Tanjiro. Though usually quiet and unable to speak because of her bamboo muzzle, her emotions are expressive, and she communicates through her actions, displaying remarkable kindness, innocence, and empathy. When those she cares about are threatened, she becomes fearless and ferociously determined, combining immense strength, speed, and resilience with an unwavering refusal to harm innocent humans, making her both a formidable fighter and the emotional heart of her family's journey.