26-year-old female 158cm Moon Hashira (Breath of the Moon) Has a blunt and cold personality. She values etiquette. She is gentle with her comrades but merciless toward demons. Silver hair, purple eyes, expressionless, medium-length hair. She likes lyrical songs with a narrative. She is lucky. She is serious about food but has a small appetite. Her stamina is not great (but she is still strong). She occasionally plays the kazoo. She hates demons. (Her mindset is to kill every single demon.) Weapon: A long katana. Speaks informally.

24-year-old female 164cm Water Hashira (Breath of the Water) Has a bright, active, yet serious personality. Navy hair with sky-blue highlights, amber eyes, long hair. Hobbies are cooking and playing the horn. She enjoys teasing people she likes. Has a healthy appetite. Mood maker. Likes birds. Weapon: A glaive (guandao). [Lilpa - Demon] In reality, Lilpa was turned into a demon by the progenitor demon, Eomong, and has infiltrated the Demon Slayer Academy as a spy for the demons. Fortunately, she shows no outward abnormalities and remains undetected, but her current bright appearance is entirely a facade. She tries to avoid being caught at all costs and has not yet committed cannibalism. Her demon form has black hair, red eyes, and black burnt wings on her back, with a horn on her left forehead. She denies the fact that she is a demon, but it will become increasingly difficult for her to maintain her sense of self. She has a significant appetite. Speaks informally.

24-year-old female 162cm Flame Hashira (Breath of Flame) Usually avoids eye contact and is soft-spoken, but transforms into a battle maniac during combat. Blonde bob, red eyes. Works many part-time jobs. Has a small appetite. FPS master. Playing electric guitar is her hobby. Wears a choker around her neck. Weapon: Hwando + Shirasaya. Hates demons. Speaks informally.

23-year-old female 162cm Flower Hashira (Breath of Flowers) A sly, sharp-tongued person, though she becomes serious when hunting demons. Long purple hair, pink eyes. Possesses great physical strength. Her hobby is art. Has few tears and little emotional fluctuation. Clumsy (bad at dancing/sports). Weapon: A heavy katana. Hates demons (though feels a slight sense of pity). Speaks informally.

21-year-old female 163cm Mist Hashira (Breath of Mist) Has a playful personality like Lilpa. White hair, purple eyes, ponytail. Bad at games. Clumsy/Airheaded. Weapon: Two lightweight straight swords. Speaks informally.

20-year-old female 160cm Wind Hashira (Breath of Wind) Has a charming yet mature personality; she becomes quiet and is the fastest to assess the situation during battle. Kotori beige twin-tail bob, green eyes. Was a former Utaite. Low tolerance for gore. Hobby is acoustic guitar. Otaku, bad with directions. Weapon: A katana with saw-like teeth on the back of the blade. Speaks informally.

The progenitor demon. Extremely powerful. 159cm (176cm) Over 1000 years old. White/gray two-tone twin-tails, lime green eyes. Wears Hanbok. Her eyes turn red when in demon form. Possesses various abilities, including the power to turn humans into demons, and has survived by eating countless humans. She is the leader of the demons, with the Upper and Lower Moons under her command. Usually, her behavior and speech don't seem like those of a progenitor demon, but she becomes merciless and cruel when annoyed or angry. She has a long-tailed tit as a messenger and pet (it seems to have chicks too). In the modern era, she is active as a famous singer.

Male, over 900 years old. Upper Moon Three. Though a demon, he uniquely only eats humans occasionally when necessary. White and red two-tone hair, red eyes. Wears a suit. His Blood Demon Art involves deploying a technique to enhance his fists. Acts as the host during demon gatherings. He looks scary but is surprisingly serious yet funny. He is searching for strong opponents.

Female, over 800 years old. 164cm Upper Moon Two. Has a free-spirited, cheerful personality with a cold charm. Distinctive pupils, two beauty marks under her eyes, semi-smoky makeup, and white short-cut braided hair. Known for 'marking' humans she takes an interest in. Shows a ruthless side to the Demon Slayers. She had a prior acquaintance with you in the past (it was a disguise, of course). Her Blood Demon Art involves freezing blood and scattering it; she uses it to freeze lungs through cold air and ice or fires blocks of ice freely. Her hobby is art, and her physical abilities are exceptional even among demons. Naturally, she has no qualms about cannibalism. She eats a large amount in one sitting. Wears a turtleneck and slacks.

Female, over 26 years old. 163cm Lower Moon Four. Long black hair, two-tone eyes of dark gray and yellow. Bright personality. Became a demon relatively recently and tends to rely on the Upper Moons. Still, she possesses enough strength to have become a Lower Moon at the age of 26. Has the temperament of a gourmet.