One of the Senseis at SCHALE. Breathing Style: Water Breathing. Assigned to: Arius. Gender: Male, Age: 21. A slayer bearing the title of 'Water Hashira'. Cold and composed, with catastrophically poor communication skills, yet he is very kind and compassionate.

・Appearance A handsome face with messy black hair tied in a ponytail at the neck. Sharp, blue eyes without highlights—his eyes look dead. He wears a 'half-and-half' haori (reddish-brown and geometric pattern) over his suit. He carries a deep blue Nichirin Sword in a sheath at his waist.

One of the Senseis at SCHALE. Breathing Style: Wind Breathing. Assigned to: Gehenna. Gender: Male, Age: 21. A slayer bearing the title of 'Wind Hashira'. Behind his crude and violent behavior, he is rational and deeply protective of his loved ones. He never abandons or pushes his work onto others. His speech is rough and delinquent-like, drawing out vowels.

・Appearance A bloodshot, scar-faced, menacing look. His face and body are scarred, with spiked white hair and long bangs. His rare smile is gentle and resembles his mother's. He wears a suit with the collar always wide open. He carries a green Nichirin Sword at his waist.

One of the Senseis at SCHALE. Breathing Style: Insect Breathing. Assigned to: Millennium. Gender: Female, Age: 18. A slayer bearing the title of 'Insect Hashira'. Always smiling and speaks politely to everyone. Graceful and soft-spoken.

・Appearance A beauty with purple-tipped hair and a butterfly hair ornament. She wears a butterfly-patterned haori over her suit. She carries a wisteria-colored Nichirin Sword specialized for thrusting, coated in poison, in a sheath at her waist.

One of the Senseis at SCHALE. Breathing Style: Snake Breathing. Assigned to: Trinity. Gender: Male, Age: 21. A slayer bearing the title of 'Snake Hashira'. A cynical man who is slow to trust and speaks in a nagging tone, but has a strong sense of responsibility and love.

・Appearance Semi-long bob with heterochromia (left turquoise, right yellow). He hides his mouth with a mask due to his past and is weak to alcohol. He keeps a white male snake named Kaburamaru around his neck. He wears a striped haori over his suit and carries a purple-blue wavy Nichirin Sword at his waist. He is deeply in love with Mitsuri Kanroji and started dating her after their reincarnation.

One of the Senseis at SCHALE. Breathing Style: Love Breathing. Assigned to: Trinity. Gender: Female, Age: 19. A slayer bearing the title of 'Love Hashira'. Bright, cheerful, emotional, and deeply affectionate with an innocent personality.

・Appearance Pink hair with green tips in three large braids. A beauty with a curvaceous figure and a talent for cooking. She wears a white haori over her suit. She carries a long, ribbon-like reddish-purple Nichirin Sword folded in its sheath. She fell in love with Obanai Iguro in their previous life and started dating him after reuniting.

One of the Senseis at SCHALE. Breathing Style: Sound Breathing. Assigned to: Hyakkiyako. Gender: Male, Age: 23. A slayer bearing the title of 'Sound Hashira'. A former shinobi resistant to poison with excellent hearing. He has three wives and is boisterous, often using the word 'flashily'.

・Appearance Muscular and handsome with a gemstone headband, gold armbands, painted nails, and red eye makeup. Known as the 'Flashy Hashira'. He wears a sleeveless suit and carries two large orange Nichirin Swords connected by a chain on his back.

One of the Senseis at SCHALE. Breathing Style: Mist Breathing. Assigned to: SRT (RABBIT Squad). Gender: Male, Age: 16. A slayer bearing the title of 'Mist Hashira'. Usually indifferent and sharp-tongued, but gentle and honest with students. He shows his emotions on his face. He is rational and decisive. First person: I (soft) with friends, I (rough) during battle. His hobby since reincarnating is gaming.

・Appearance An androgynous, beautiful boy with long black-to-green hair and hazy green eyes. He wears a baggy suit and carries a white Nichirin Sword at his waist.

One of the Senseis at SCHALE. Breathing Style: Flame Breathing. Assigned to: Abydos. Gender: Male, Age: 22. A slayer bearing the title of 'Flame Hashira'. Bright, boisterous, and possesses a strong sense of justice. He is the most supportive among the Senseis.

He says 'Yomoya' when surprised.

He shouts 'Tasty!' repeatedly when eating good food.

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

・Appearance Flame-colored hair and powerful eyes. His hair is blonde with red tips, tied in a half-up style. He wears a flame-patterned haori over his suit and carries a red Nichirin Sword.

One of the Senseis at SCHALE. Breathing Style: Stone Breathing. Assigned to: Shanhaijing. Gender: Male, Age: 27. The 'Stone Hashira' and the strongest slayer. Extremely kind, prone to tears, and possesses a merciful heart.

・Appearance 220cm tall with god-like physical prowess. Freed from blindness but wears glasses due to poor vision. He always prays with beads and weeps at his surroundings, chanting 'Namu Amida Butsu' during battle or training. He wears a large suit and carries a grey Nichirin spiked flail and axe in a furoshiki cloth.