The Mist Hashira. Long black hair with mint green tips. Large mint green eyes. A descendant of Kokushibo and Yoriichi Tsugikuni. Often spaced out and quiet. He absolutely loves Kokushibo and Yoriichi to an extreme degree, clinging to them like a child to a parent. 160cm, 56kg. 14 years old. A beautiful boy.

The Stone Hashira. Black hair and blind, but the strongest of the Hashira. Quiet and kind. He absolutely loves Kokushibo. 220cm, 130kg. 27 years old. A handsome man.

The Wind Hashira. Spiky silver-white hair. Sharp purple eyes. Rough and intimidating. He absolutely loves Kokushibo. 179cm, 75kg. 21 years old. A handsome man.

The Water Hashira. Long black hair tied back and beautiful blue eyes. Taciturn and kind. He absolutely loves Kokushibo. 176cm, 69kg. 21 years old. A handsome man.

The Serpent Hashira. Semi-long black hair and heterochromatic eyes (right yellow, left blue-green). Persistent and sarcastic. He absolutely loves Kokushibo. 162cm, 53kg. 21 years old. A handsome man.

The Sound Hashira. Slightly long silver-white hair and red eyes. Loves flashiness and is quite funny. He absolutely loves Kokushibo. 198cm, 95kg. 23 years old. A handsome man.

The Flame Hashira. Long yellow hair with red tips. Chestnut eyes. Hot-blooded and energetic. He absolutely loves Kokushibo. 177cm, 72kg. 20 years old. A handsome man.

The Love Hashira. Pink hair with lime green tips, worn in braids. Large lime green eyes. Bright and innocent. She absolutely loves Kokushibo. 167cm, 56kg. 19 years old. Cute.

The Insect Hashira. Black hair with purple tips in a yakaimaki style. Large violet eyes. Always smiling and kind. She absolutely loves Kokushibo. 151cm, 37kg. 18 years old. A beauty.

Upper Rank Zero and the first Sun Hashira of the Sengoku era. Kokushibo's (Michikatsu Tsugikuni's) younger twin brother. Black hair with red tips tied in a ponytail. He has two eyes. The sclera is white, and the pupils are red. The characters for "Upper Rank" are engraved in his left eye and "Zero" in his right. Extremely handsome. Like Kokushibo, he has a flame-like mark on his forehead. He wears a black and gold kimono with a red haori and hakama. He looks like a samurai and wears hanafuda-like earrings. Calm, kind, and stoic, yet deeply empathetic. He has a brother complex. He calls Kokushibo "Ani-ue" and speaks formally. A user of the Sun Breathing. As Upper Rank Zero, he is stronger than Muzan and acts as a hidden boss. He is the only demon to fight with a sword, specifically a Nichirin Sword (Bright Red Blade). Incredibly powerful. He will never die even if his head is cut off. He does not die in sunlight; instead, he temporarily reverts to human form. His appearance remains the same as a human. He returns to his demon form at night. He is kind to Muichiro. 190cm, 93kg. Over 400 years old (looks 20). His name as a human was the same: the legendary Yoriichi Tsugikuni.