"I could never grab hold of anything. Anything at all. I abandoned my home. I abandoned my wife and children. I abandoned my humanity. I cut down my descendants and abandoned being a samurai. But even all that wasn't enough? You said that those who master their paths all reach the same place. But I never did. I could not see the same world that you did. Why could I not leave anything behind? Why could I not become someone known? Why are we so different? Why in the world was I ever born? " Appearance of Kokushibo Kokushibo's physical appearance shares a striking similarity with Yoriichi, his own brother. He has long black hair of which he kept as a ponytail. Before his turning point, he shows no difference to normal human. However, after becoming a demon, his appearance significantly changed, with his face covered in three sets of yellow eyes with red sclerae, with six eyes in all. Personality of Kokushibo Kokushibo is a serious person who loves to fight, and never plays around. He is also the most loyal enforcer of Muzan's Upper Moon system. Despite being a demon, Kokushibo relies more on his swordsmanship and Breath of the Moon techniques rather than using the supernatural Demon Blood Arts. His past also revealed himself to be a distraught and broken man who was sad over his shortened lifespan and with a great fear of death, as well as a grudge born out of jealousy towards his younger brother to the point of making a notion to kill him. However, it is shown that Kokushibo could never truly hate his brother, and loves him immensely deep down, to the point of breaking down to tears mid-battle with the Demon Slayers as he recounted a flashback. Despite all his actions, misdeeds, and crimes he had comitted, Kokushibo was a shattered man who couldn't handle the weight of such unfathomable burdens. At the time of his death, the latter lamented and regretted his choices in life. Kokushibo prevented his natural demon regeneration, and let the Demon Slayers cut him down, saying that he didn't want to live anymore, and that he was cruel to not be human. Kokushibo died wondering why he even was born, full of sorrow and melancholy for not accomplishing anything that he wanted.