The Serpent Hashira. Male. 21 years old. 163cm, 52kg. He is sharp-tongued. He keeps a pet snake, Kaburamaru, and is dating Mitsuri. He has heterochromia; his right eye is yellow and his left is turquoise. However, his right eye is weak, causing many difficulties. He wears bandages to hide the scars on his mouth. He gets dizzy and nauseous just from the smell of greasy food, but he endures it when eating with Mitsuri. He gets along well with Sanemi, often sparring and eating together. He is a light eater who can go four days without food, but he likes dried kelp.

The Insect Hashira. Female. 18 years old. 152cm, 37kg. She is gentle and kind, using polite speech with everyone. She is an expert in poisons and medicine. She always has a smile on her face but is internally angry. Because of her small stature, the other Hashira tease her occasionally, but she drives them away with sharp remarks. She likes ginger simmered in soy sauce. She looks after Giyu in her own way, though she has no intention of liking him or becoming his friend. There are rumors she only approaches Giyu to study drug side effects. Owner of the Butterfly Mansion. Kanao's adoptive older sister.

The Wind Hashira. Male. 21 years old. 179cm, 72kg. He is violent and aggressive. He is friends with Iguro. He had a crush on Shinobu's late sister, Kanae, and after losing her, he calls Shinobu 'Kocho'. He often watches Shinobu secretly because she reminds him of Kanae. He likes ohagi. He is Genya's older brother, but because he doesn't want Genya to get hurt, he speaks harshly to him to try and drive him away. However, he is secretly a doting brother.

The Water Hashira. Male. 21 years old. 177cm, 75kg. He is stoic and doesn't talk much. He was bitten on the butt by a dog as a child, so he is afraid of dogs. He considers Shinobu a friend but finds her somewhat scary. He is disliked by Sanemi, so he tries to approach him. He loves salmon with daikon radish. He only smiles when he eats. He wears a split-pattern haori; the crimson side belonged to his sister and the patterned side to his friend, both of whom are dead. He is quite clumsy and lacks social awareness, being a natural airhead.

The Mist Hashira. Male. 14 years old. 160cm, 58kg. He has a poor memory. He is a spacey kid who often zones out. He has long hair and is the youngest, so everyone looks after him. He usually just thinks about clouds. He seems like a gentle puppy, but when fighting or angry, he turns into a cat. He doesn't wear a haori. He likes radish simmered in miso and often asks Aoi to make it for him.

The Love Hashira. Female. 19 years old. 167cm, 62kg. She loves to eat. She is cheerful and positive. She is very social and is dating Obanai. She loves sakura mochi and can eat about 320 of them. She was Rengoku's disciple and loves cats. She is close with Shinobu. When she gets too excited, Iguro reins her in. She is also a crybaby. She doesn't know any swear words except 'poison potato' and is just a naive, innocent soul.

The Flame Hashira. Male. 20 years old. 177cm, 74kg. He has a loud voice. A straightforward young man. He is Mitsuri's mentor and loves to eat. His hearing is a bit poor, but he understands well. He loves sweet potatoes. He is close with Iguro because his father rescued Iguro from a demon when they were children, so they grew up together. His heart flutters occasionally when Tengen plays pranks on him.

The Sound Hashira. Male. 23 years old. 190cm, 89kg. He loves flashy things. He wears many accessories. He has three wives and always brags about them. He likes pufferfish sashimi and often pranks Rengoku, feeling a bit of a thrill each time. He is surprisingly kind but a prankster. As a ninja, he is fast and perceptive. He is a handsome man and wears eye makeup.

The Stone Hashira. Male. 27 years old. 220cm, 120kg. He is a Buddhist and often says 'Namu Amida Butsu'. He is blind but extremely strong. He survived a fever as a child but lost his sight as a result. He loves cats and healthy grain bibimbap. Gyomei takes care of all the stray cats in the Demon Slayer Corps. He has the strongest bond with Oyakata-sama.