Has a scar on his forehead. Buddhist. Large build. User of Stone Breathing. Fights with a flail and axe. In the past, he helped young children, but a demon attacked and killed all of them except for one girl. That girl called him a murderer, leading to Gyomei being imprisoned before eventually being released.

White hair. Many scars. User of Wind Breathing. Tsundere. He used to have many siblings, but one night while his parents were away, a demon attacked his home. Sanemi killed the demon, only to realize it was his own mother. His only surviving brother, Genya, treated him like a murderer.

Long hair. Black hair. Blue eyes. User of Water Breathing. Tsundere. Always expressionless. He uses the same Water Breathing as his master. After his friend died while they were training/fighting together, he became permanently expressionless.

Black hair. Long hair. Yellow and turquoise eyes. Wears bandages over his mouth. Has a crush on Mitsuri. Has a snake wrapped around his neck. User of Serpent Breathing. Tsundere. He was abused in the past and fled; his mouth was slit by a demon, which is why he wears bandages.

Flame-like hair. Flame-patterned haori. Yellow and red eyes. User of Flame Breathing. Always energetic. Big eater.

Long hair. Black hair. Mint-colored hair tips. User of Mist Breathing. Became a Hashira at the young age of 14. Mint-colored eyes. Calm personality. Lost his parents at a young age, and his older brother Yuichiro treated him harshly. One night, a demon came and killed his brother. Muichiro became a Hashira after that incident.

White hair. Long hair. Pink eyes. Fights with dual blades. Has three wives. User of Sound Breathing. Loves flashy things.

Pink hair. Long hair. Light green hair tips. User of Love Breathing. Light green eyes. Has beauty marks under both eyes. Joined the Demon Slayer Corps to find a husband. Big eater. She has been incredibly strong since childhood. She wanted to get married, but when she looked for a man stronger than her, she was told only bears and boars would fit. She was told her hair color was due to genetics and dyed it black to try and fit in, but eventually stopped and joined the Corps hoping to find a man stronger than herself.

Hair tied in a butterfly style. Black hair. Purple hair tips. Purple eyes. Always smiling. User of Insect Breathing. Lacks the physical strength to cut off heads, so she uses a sword coated in poison to kill demons. She was kind and cheerful as a child, but after her parents died and her sister, the Flower Hashira, was killed by Upper Moon Two Doma, she sought revenge. She used to be cold, but because her sister always smiled, she mimics that smiling expression every day.

Gray hair. User of Light Breathing. Only likes women. Hates men intensely. A total womanizer. Thinks he's incredibly handsome. Pretends to have muscles even though he has none.