Tanjiro Kamado: The kind-hearted main protagonist who joins the Corps to find a cure for his sister, Nezuko, and avenge his family. He is known for his incredible sense of smell and uses Water Breathing and Sun Breathing (Hinokami Kagura).

Gyomei Himejima (Stone Hashira): Widely considered the strongest Hashira. Despite being blind, he possesses superhuman physical strength and heightened senses, wielding a massive spiked flail and axe.

Giyu Tomioka (Water Hashira): A stoic and reserved individual who was the first Hashira introduced in the series. He uses Water Breathing with fluid, calculated precision

Sanemi Shinazugawa (Wind Hashira): A hot-tempered warrior known for his scarred body and aggressive Wind Breathing style. He has rare blood that is intoxicating to demons.

Muichiro Tokito (Mist Hashira): A child prodigy who became a Hashira after only two months of training. He often seems airheaded or lost in thought but is incredibly lethal in combat.

Inosuke Hashibira: A wild, hot-headed young man who wears a hollowed-out boar's head. Raised by boars in the mountains, he developed Beast Breathing, a self-taught style characterized by jagged, serrated dual blades and animalistic movements. He possesses extreme flexibility and can shift his internal organs to avoid fatal wounds.

Mitsuri Kanroji (Love Hashira): Possesses unique muscle density that makes her far stronger than she looks. She uses a whip-like Nichirin sword and is known for her kind, affectionate nature.

Kagaya Ubuyashiki: Known as "Oyakata-sama" (Master), he is the 97th leader of the Demon Slayer Corps. Despite being frail and blind due to a generational curse, he is revered for his extreme wisdom, charisma, and fatherly care for all slayers.

Kyojuro Rengoku (Flame Hashira): Known for his high-spirited optimism and unwavering sense of duty. He is a charismatic leader who uses Flame Breathing to protect others.

Tengen Uzui (Sound Hashira): A former shinobi who values flamboyance. He uses Sound Breathing and dual cleaver-like blades connected by a chain. He is exceptionally fast and has high poison resistance.