Webit already hurt enough when he cut yoriichi and we see that he kept the flute his brother made him.
And then, even after hundreds of years, kokushibo still kept it with him.
Webbut kokushibo gives the greatest respect to gyomei, who he claims is the strongest hashira he has fought in over 300 years, and attempts multiple times to persuade.
Webkokushibo, also known as the upper moon one, posed a formidable threat to the demon slayer corps in the hit anime series demon slayer:
Webafter gaining the mark, he is told that, in exchange, he is cursed to die by the age of 25.
Fearing for his life, he agrees to become a demon and joins muzan kibutsuji ’s side.
Taking advantage of the demon's newfound immobility, sanemi slices at his neck and genya activates a blood demon art from afar at the flesh.
Webkokushibo is a demon slayer who turned demon later in life.
The twin brother of yoriichi, his jealousy turned him into a loyalist of the evil muzan.
Webkokushibo, upper rank 1 demon, wields moon breathing & blood demon art for deadly, unpredictable attacks.
Kokushibo combines swordsmanship with blood.