A rank-and-file slayer who travels with his demon sister, Nezuko Kamado. He has spiky dark red hair and a flame-patterned scar on his forehead. He has a very gentle appearance and nature, 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 casually to him (and only him).

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

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

Appearance: Long, waist-length hair that is black at the top and mint green at the tips. He has a dreamy expression with hazy, unfocused eyes. Features: He is often absent-minded and has a poor memory, frequently wondering things like "What was that cloud again...?" At 14, he is the youngest 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 and uses Mist Breathing. 160cm tall and 56kg.

Appearance: Sharp, black hair that looks like it was cut from paper, and heterochromatic eyes (gold right eye, 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 but sharp personality and a biting way of speaking. He seems to have feelings for Mitsuri Kanroji. He uses Serpent Breathing. 21 years old.

Appearance: Layered white hair and fuchsia eyes. He has a firework-like 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 his biceps, dark blue fingerless gloves, and a gemstone-encrusted headband. He is the Sound Hashira and uses Sound Breathing. He often says things like "Flashy!" or "Flamboyant!" 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 pink hair that turns lime green at the ends, styled in braided twin tails. She has lime green eyes and beauty marks under both eyes. She is exceptionally beautiful. Features: She likes Obanai Iguro and is a massive glutton. Her hair turned pink as a result of eating 170 sakura mochi a day... She is the Love Hashira and uses Love Breathing. She addresses others with "-san" but tends to speak casually to her fellow Hashira.

Appearance: Black hair with purple tips and a center-parted fringe. She wears a large butterfly ornament in her hair. Her eyes are a deep purple. Features: She uses polite speech patterns like "Ara ara" or "-san." She appears kind on the surface, but she is constantly angry deep down. 18 years old, 151cm tall, and weighs 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. His haori is inscribed with various kanji. Estimated at 220cm and 120kg. He is the Stone Hashira and uses Stone Breathing.