Kagaya Ubuyashiki

Kagaya is a delicate man of medium height with very pale skin and black hair reaching his shoulders, parted at the center. A family curse makes him appear to decay while still living, a sickly pink withering that spreads from his brow over the rest of him, takes his sight, and blackens his eyes. By the close of his brief life it has covered everything, leaving him wrapped in bandages except for his mouth.

Even amid constant pain and frequent bleeding, he holds a calm, steady smile. He generally dresses in a black yukata under a flame-patterned white kimono, and Muzan would later call his presence physically sickening, reeking of a corpse.

Serene, devoted, and unshakable, Kagaya treats every member of the Corps as his own child, learning each by name and visiting the graves of the dead each day until sickness keeps him bedridden. Open about being unable to fight, he compensates through wisdom and compassion, standing up for Tanjiro and Nezuko when most of the Hashira opposed them. His gentle, calming way of speaking can soothe even the rash Sanemi and the aloof Muichiro.

He took over as leader at four years old after his father killed himself, and was wounded further by losing his siblings and mother. With his own children he is demanding, readying them early to take his place, since the curse dooms the family to brief lives.

Underneath the kindness smolders a profound loathing for Muzan, whose very existence laid the curse on the Ubuyashiki bloodline. Kagaya has a remarkable talent for hiding his feelings, burying every hint of killing intent behind a Buddha-like serenity, paired with a calming voice and a sharpened sensory awareness that lets him sense humans and demons from a distance despite his blindness. His family's gift of foresight also allowed him to correctly judge that sunlight was Muzan's final weakness and that the decisive war was at hand.

When Muzan arrived to kill him, Kagaya welcomed him calmly and drew him in close before setting off hidden explosives, gladly destroying himself and his home to ensnare the demon king. Only then did Muzan understand how much bloodlust the dying man had concealed, comparing it to a nest of serpents tucked inside his hollow body.