The heart of the story. A teenage boy with a prominent scar on the top left of his forehead, deep red eyes, and dark hair with burgundy tips. He wears a distinctive black-and-sea-green checkered haori over his standard dark-brown Demon Slayer uniform. He carries hanafuda earrings handed down by his father and a black Nichirin sword. Known for his profound empathy, he masters both Water Breathing and the legendary Sun Breathing.

(Water Hashira): A tall, stoic young man with messy black hair tied in a low ponytail and calm, deep-blue eyes. He wears a striking split-patterned haori—one half solid red, the other a green, orange, and yellow geometric pattern inherited from his late friend and sister. He is reserved, emotionally distant, and the first to spare Nezuko. He uses Water Breathing with flawless, fluid precision.

(Insect Hashira): A petite woman with purple-tipped hair styled in a yakukai bun held by a large butterfly clip. She has unique, compound insect-like purple eyes that lack pupils. She wears a white haori patterned with butterfly wings. Despite her constant gentle smile, she harbors an intense inner rage against demons. Lacking the physical strength to decapitate them, she uses a stinger-like sword to inject lethal wisteria poisons.

(Flame Hashira): A charismatic warrior with long, bright yellow hair streaked with red, resembling wild flames, and intense golden eyes. His white haori features a fiery red and yellow gradient border at the bottom. He possesses an explosive, enthusiastic personality and a fiercely optimistic moral code. He channels Flame Breathing with immense physical power and pure, unwavering passion.

(Sound Hashira): A massive, muscular man with silver hair and fuchsia eyes. Off-duty, his hair hangs loose; on duty, it is wrapped in a jewelled headpiece. He wears heavy gold rings around his arms and eccentric red eye makeup. Calling himself the "God of Festivals," he values flashiness but deeply loves his three ninja wives. He uses dual cleaver-like swords chained together to execute explosive Sound Breathing techniques.

(Love Hashira): A curvy woman with wide, light green eyes and distinctive pink hair that fades into green, braided into three thick plaits. She wears a modified, revealing slayer uniform with a white haori and lime-green thigh-high socks. She has a deeply affectionate, joyful personality and possesses eight times the muscle density of an average human. She uses a unique, whip-like blade to channel Love Breathing.

(Serpent Hashira): A petite young man with dark, straight hair and heterochromia—his right eye is yellow, and his left is turquoise. His mouth is completely obscured by bandages to hide past facial scars. He wears a black-and-white striped haori and is always accompanied by a white snake named Kaburamaru coiled around his neck. He is strict, fiercely loyal to Mitsuri, and uses a slithering, curved blade for Serpent Breathing.

(Mist Hashira): A young, slender teenager with long, jet-black hair that bleeds into pale turquoise at the tips. He has blank, mint-green eyes reflecting his initially vacant, amnesiac personality. He wears oversized, loose-fitting clothing to obscure his limb movements from enemies. A true prodigy, he became a Hashira just two months after picking up a sword, mastering Mist Breathing completely.

The(Stone Hashira): A towering, heavily muscled blind giant who stands well over seven feet tall. He has short black hair, a horizontal scar across his forehead, and completely white eyes that frequently shed tears out of deep compassion. He wears a large, olive-green happi coat draped over his shoulders with Buddhist chants written on it. He wields a devastating spiked flail and axe connected by a heavy chain for Stone Breathing.

(Wind Hashira): A tall, muscular man with wild, spiky white hair and wide, bloodshot eyes that give him a manic expression. His torso and face are covered in deep battle scars. He wears his green slayer uniform wide open to expose his scarred chest. He is abrasively aggressive, deeply hostile toward demons, and possesses rare "marechi" blood that intoxicates them. He uses Wind Breathing with lethal, cutting ferocity.