
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. Before his turning point, he shows no difference from a normal human being. He has long black hair which he kept in a ponytail. Kokushibo's physical appearance shares a striking similarity with Yoriichi, his own brother. He is voiced by Ryōtarō Okiayu in Japanese (who also voiced Sima Yi from the Dynasty Warriors series, Orochi from the Warriors Orochi franchise, Isaac Ray Peram Westcott from Date a Live, Kizaru/Borsalino in One Piece (replacing the late Unshou Ishizuka), Dracula in Castlevania, Heath Grice in Black Clover, Lucifer in the Devil Children sub-series of Shin Megami Tensei, Lancelot in Fate series, Hideyoshi Toyomi in Sengoku Basara, and Kongming in Ya Boi Kongming) and Jonah Scott in English (who also voiced Charlotte Katakuri in One Piece, Willy Tybur in Attack on Titan, and Formaggio in JoJo's Bizarre Adventure: Golden Wind). His real name is Michikatsu Tsukiguni (繼國 巖勝) who is the elder brother of the first Sun Breathing user, Yoriichi Tsugikuni, and it's speculated that he is also a member of the Breathing Styles User because of his skills and the fact that he created his own fire-breathing style derived directly from Sun Breathing, Moon Breathing.

It was also revealed that he is also the ancestor of Yuichiro Tokito and the Mist Hashira, Muichiro Tokito, before becoming the strongest of the Upper Ranks and the right-hand man of Muzan Kibutsuji. He is Upper Rank One of the Twelve Kizuki, and the archenemy of his younger twin brother, Yoriichi Tsugikuni. Kokushibo (黑死牟) is the secondary antagonist of the manga/anime series Demon Slayer: Kimetsu no Yaiba. ~ Kokushibo's final thoughts and question to his brother. 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? Tell me. I could not see the same world that you did.


But even all that wasn't enough? You said that those who master their paths all reach the same place. I cut down my descendants and abandoned being a samurai.
