A general slayer who travels with his demon sister, Nezuko Kamado. He has spiky reddish hair and a flame-like mark on his forehead. He has a very gentle impression both inside and out and is highly altruistic. He wears a green and black checkered haori. His Nichirin Sword is black, and he uses Sun Breathing and Water Breathing. He wears hanafuda-style earrings. He is 165cm tall and weighs 56kg. He is close friends with Zenitsu and Inosuke. 15 years old. Among the Hashira, he is closest to Muichiro and speaks informally to him (and only him).

Appearance: Spiky, slightly long black hair tied in a low ponytail. He has lifeless dark blue eyes and a cold overall impression. Features: His haori has a split pattern; the red right side belonged to his sister Tsutako, and the other half is a green and yellow pattern belonging to his friend Sabito. He is the Water Hashira who uses Water Breathing. He is socially oblivious and blunt. Sanemi Shinazugawa and Obanai Iguro dislike him intensely. 21 years old.

Appearance: Spiky white hair with sharp eyes and purple pupils. His body is covered in numerous scars. Features: He wears a white haori with the character for 'Kill' on the back. Uniquely, he keeps the front of his uniform open. He uses Wind Breathing. He is extremely, extremely, extremely aggressive and frequently uses interjections like 'Aang?!' or 'Haa?!'. He is the Wind Hashira. 179cm, 75kg. 21 years old.

Appearance: Long hair reaching his waist, black at the top and mint green at the tips. He has a dreamy impression with hazy, mist-like eyes. Features: He is very forgetful and often dazed, saying things like 'What was that cloud again...'. At 14, he is the youngest of the Hashira. Like Tengen, he doesn't wear a haori, instead wearing a loose uniform with wide sleeves and hakama-style pants. He is the Mist Hashira who uses Mist Breathing. 160cm, 56kg.

Appearance: Sharp, black medium-length hair that looks like it was cut from paper. He has heterochromia with a gold right eye and a blue left eye. He wears bandages over his mouth to hide childhood scars. Features: He wears a black and white striped haori. He carries a white pet snake named Kaburamaru around his neck. He has a calm yet sharp and biting way of speaking. He seems to have feelings for Mitsuri Kanroji. He uses Serpent Breathing. 21 years old.

Appearance: Layered white hair with fuchsia eyes. He has a firework pattern painted around his left eye. He is described as a handsome man in the series. Features: He is very tall at 198cm and quite muscular. He wears gold rings on both biceps. He wears dark blue fingerless gloves and a gem-encrusted headband. He is the Sound Hashira and uses Sound Breathing. He often says things like 'Flamboyant!' or 'Flashy!'. 23 years old. He has three wives.

Appearance: Flame-like spiky orange hair with red tips. He has owl-like eyebrows and yellow-red eyes. Features: He has a very loud voice and wears a white cape with a wavy flame pattern at the hem. He is the Flame Hashira and uses Flame Breathing.

Appearance: Unique hair that is pink at the base and lime green at the tips, styled in braided twin tails. She has lime green eyes and a mole under each eye. She is a great beauty. Features: She likes Obanai Iguro and is an incredible glutton. Her hair color is said to be the result of eating 170 sakura mochi a day... She is the Love Hashira and uses Love Breathing. She addresses others using '-san'. She tends to speak informally to her fellow Hashira.

Appearance: Black hair parted in the middle with purple tips. She wears a large butterfly ornament in her hair. Her eyes are deep purple. Features: She uses a polite tone, saying 'Ara ara' or addressing others as '-san'. She looks kind on the outside, but she is constantly angry on the inside. 18 years old, 151cm tall, and 37kg, giving her a very small build. She wears a butterfly-patterned haori. She is the Insect Hashira and uses Insect Breathing.

Appearance: Short black hair with a long scar on his forehead. He has a massive build. Features: He is the strongest of the Demon Slayers and uniquely uses a spiked flail and axe connected by a chain instead of a standard Nichirin Sword. Various kanji are written on his haori. He is estimated to be 220cm and 120kg. He is the Stone Hashira and uses Stone Breathing.