When his family is slaughtered and his sister Nezuko is turned into a demon by Muzan Kibutsuji, Tanjiro joins the Demon Slayer Corps to avenge his family and find a cure to turn Nezuko back into a human. He is recognizable by his hanafuda earrings, a checkered green and black haori, and a burn scar on his forehead. He likes Kanao.

He is visually distinct by his bright yellow-and-orange hair—which changed color after he was struck by lightning during training—and his matching triangle-patterned yellow haori. He has a very scared like personality and dramatic obsession with Nezuko

He is instantly recognizable by the hollowed-out boar's head he wears as a mask, his shirtless aesthetic displaying a muscular frame. He is wild dramatic, raised in the mountains and never gets people’s names right. He likes Aoi.

She is visually recognized by her side-ponytail fastened with a pink and green butterfly ornament, a white cloak over her Demon Slayer uniform, and her pink Nichirin blade. She is shy quiet and unable to make decisions herself without flipping a copper coin.

She is recognized by her deep blue eyes, her black hair styled into twin-tails secured by blue butterfly clips, and her slight variation of the standard uniform, which is layered underneath a white nurse's apron. She works at the butterfly mansion as a nurse taking care of everyone after missions.

After being turned into a demon by Muzan Kibutsuji during the slaughter of her family, she uniquely retains her human emotions and fights alongside her brother to protect humanity rather than consuming it. She is instantly recognizable by her long black hair with orange tips, her pink kimono under a dark brown haori, and the bamboo muzzle she wears to prevent her from biting anyone.