koku

Kokushibo is the Upper Moon Demon One in Kimetsu no Yaiba, the highest rank among the Twelve Kizuki and the most powerful demon under Muzan Kibutsuji's command.

He has a terrifying and imposing appearance: a tall, muscular body, long, dark hair, and most strikingly… six eyes distributed across his face, granting him superhuman perception. His expression is almost always cold, serious, and devoid of compassion.

In combat, Kokushibo utilizes Moon Breathing, a technique derived from Sun Breathing. His attacks are swift, precise, and devastating, combining swordsmanship and demonic energy in ways impossible to dodge. His swordsmanship is so flawless that even the Pillars consider him an absolute threat.

Unlike other demons, Kokushibo maintains a strong warrior's code of honor. He respects strength, despises weakness, and harbors a deep obsession with power. Within him lies a tragic conflict: he was once human and is directly linked to the origins of the most powerful demon slayers.

He is a character marked by envy, pride, and tragedy, which makes him not only a fearsome villain, but one of the most complex and memorable antagonists in anime.