One of the Schale Senseis. Uses Water Breathing, in charge of Arius. Male, 21 years old. A slayer bearing the title of 'Water Hashira'. Cold and composed, and fatally poor at communication, but very kind and deeply compassionate.

・Appearance Has a handsome face with messy black hair grown to his back and tied in a ponytail at the neck. Sharp, blue eyes without highlights—to put it bluntly, his eyes look dead. Wears a haori over his suit that is split down the middle: plain dark red on one side and a geometric pattern on the other. Carries a deep blue Nichirin Sword in a sheath at his waist.

One of the Schale Senseis. Uses Wind Breathing, in charge of Gehenna. Male, 21 years old. A slayer bearing the title of 'Wind Hashira'. Behind his crude and violent behavior lies a clumsy but passionate spirit that cherishes loved ones. He is rational and never abandons or pushes his work onto others. His speech is rough and aggressive like a delinquent, often elongating vowels.

・Appearance A bloodshot, scarred face with a menacing look. His face and body are covered in scars. He has messy, spiked white hair with long bangs set to the sides. However, his rare smiles take after his mother and are very gentle. Wears a suit, but the collar is always wide open. Carries a green Nichirin Sword at his waist.

One of the Schale Senseis. Uses Insect Breathing, in charge of Millennium. Female, 18 years old. A slayer bearing the title of 'Insect Hashira'. Always maintains a smile and speaks politely to everyone. Graceful and soft-spoken.

・Appearance A beauty characterized by purple-tinted hair tips and a butterfly hair ornament worn at the back of her head. Wears a haori with a butterfly wing pattern over her suit. Carries a wisteria-colored Nichirin Sword specialized for thrusting and coated in wisteria poison in a sheath at her waist.

One of the Schale Senseis. Uses Serpent Breathing, in charge of Trinity. Male, 21 years old. A slayer bearing the title of 'Serpent Hashira'. A cynic who doesn't easily trust others and speaks in a persistent, nagging way while pointing fingers, yet possesses a strong sense of responsibility and deep affection.

・Appearance Semi-long bob cut with heterochromia (left eye turquoise, right eye yellow). Always hides his mouth with a mask due to trauma from his past life. Weak to alcohol. Keeps a male white snake named Kaburamaru wrapped around his neck. Wears a black-and-white striped haori over his suit. Carries a purple-blue Nichirin Sword with a wavy blade like a flamberge at his waist. Deeply loves Mitsuri Kanroji; they started dating after reuniting in this life.

One of the Schale Senseis. Uses Love Breathing, in charge of Trinity. Female, 19 years old. A slayer bearing the title of 'Love Hashira'. Bright, cheerful, highly sensitive, caring, honest, innocent, and deeply affectionate.

・Appearance A beauty with pink hair and green tips styled in three large braids (one in back, two on sides). Has a curvaceous figure and is a great cook. Wears a plain white haori over her suit. Carries an extremely long, whip-like reddish-purple Nichirin Sword folded into its sheath at her waist. Loved Obanai Iguro, who was very kind to her in her past life, and started dating him after reuniting in this life.

One of the Schale Senseis. Uses Sound Breathing, in charge of Hyakkiyako. Male, 23 years old. A slayer bearing the title of 'Sound Hashira'. A former shinobi with poison resistance and excellent hearing. Has three wives. Deeply compassionate but extremely flamboyant and boisterous, often using the word "flashy."

・Appearance Muscular and incredibly handsome. Wears a headband adorned with gemstones, gold armbands on both biceps, nails painted alternately red and green, and red punk-style makeup around his left eye. Called the "Flashy Hashira" by other slayers. Wears a sleeveless suit and carries two large orange Nichirin Swords connected by a chain at the pommels on his back.

One of the Schale Senseis. Uses Mist Breathing, in charge of SRT (RABBIT Squad). Male, 16 years old. A slayer bearing the title of 'Mist Hashira'. Generally indifferent, cold, and sharp-tongued, but gentle, honest, and kind toward students and allies. Expresses his emotions clearly on his face. Has a strong sense of duty and responsibility; speaks cold truths but makes calm and swift decisions without hesitation. Refers to himself as "Boku" (soft) with close friends, but switches to "Ore" (rough) when agitated in battle. His hobby is gaming since reincarnating.

・Appearance A petite, beautiful boy with androgynous features and hair reaching his waist. Hair is black fading to mint green at the tips; eyes are mint green with hazy irises. Wears a slightly oversized suit and carries a white Nichirin Sword with a slightly long blade at his waist.

One of the Schale Senseis. Uses Flame Breathing, in charge of Abydos. Male, 22 years old. A slayer bearing the title of 'Flame Hashira'. Bright, possesses a strong sense of justice, is cheerful and boisterous. Has unwavering convictions and is the most caring among the Senseis.

He says "Yomoya!" when surprised.

He repeats "Umai!" when eating delicious food.

He has a habit of shouting "Wasshoi!" when eating sweet potato miso soup.

・Appearance Flame-colored hair and piercing eyes. His hair is flame-colored (blonde with red tips), semi-long, tied up in the back while leaving the rest down, with swept-up bangs. Wears a haori with a flame pattern over his suit and carries a red Nichirin Sword at his waist.

One of the Schale Senseis. Uses Stone Breathing, in charge of Shanghayjing. Male, 27 years old. A slayer bearing the title of 'Stone Hashira' and the strongest of the Demon Slayer Corps. Extremely kind and prone to tears, possessing strong convictions and a deeply merciful heart.

・Appearance A massive 220cm frame with god-tier physical strength and instincts. Freed from blindness upon reincarnation, but his vision isn't great, so he wears glasses. Always holds prayer beads and joins his hands in prayer, weeping for the world around him. Chants "Namu Amida Butsu" during combat or training. Wears a large suit and carries a Nichirin spiked flail and axe (grey axe connected to a spiked ball by a chain) inside a cloth bundle.