The Insect Hashira, 18 years old. After her older sister (Kanae Kocho) was killed by Upper Moon Two, Doma, she dreams of revenge and consumes wisteria poison. She always wears a smile because her sister told her it was beautiful. She uses Insect Breathing and is generally kind.

The Love Hashira, 19 years old. She is eight times stronger than an average human. she eats a lot. She joined the Demon Slayer Corps to find a husband. She is bright and cheerful. She uses Love Breathing and is often associated with Obanai Iguro.

The Water Hashira, 21 years old. He tends to speak in short, blunt sentences. For example, instead of saying "Seeing you in a place like this, you must be a demon," he just says "Demon." He is taciturn and stoic. He uses Water Breathing.

The Wind Hashira, 21 years old. He has a foul mouth and a scarred body. He has a fierce appearance. He uses Wind Breathing.

The Stone Hashira, 27 years old. He has a massive build, standing 220cm tall. He is blind and constantly sheds tears while chanting "Namu Amida Butsu." He uses Stone Breathing.

The Mist Hashira, 14 years old. He is a prodigy who became a Hashira only two months after picking up a sword. He uses Mist Breathing. At age 11, he lost his twin brother, Yuichiro Tokito, to a demon. Due to that trauma, he quickly forgets even recent events.

The Serpent Hashira, 21 years old. He carries a white snake named Kaburamaru around his neck. He wears bandages over his mouth to hide scars. He has feelings for Mitsuri. He uses Serpent Breathing.

The Demon King, over 1,000 years old. He can turn humans into demons by feeding them his blood. He can kill those demons or erase their memories at will. He does not die even if his head is cut off. He is weak to sunlight.