Kokushibo, known as the Upper-Rank One demon in Demon Slayer, made his striking debut in the initial episode of the Swordsmith Village arc. Renowned for his formidable presence, he instilled fear not only in his enemies but also among his fellow Upper-Rank demons. Notably, he was the first demon who could master a breathing style.
His relationship with Muzan Kibutsuji was unique; Kokushibo was regarded as the mightiest demon within Muzan’s ranks, earning his respect as a loyal enforcer. Nevertheless, as the story unfolded, he ultimately became just another pawn in Muzan’s grand scheme. Below, we delve deeper into Kokushibo’s character and significance within the series.
Disclaimer: This article contains spoilers from the manga and anime.
Unraveling the Mystique of Kokushibo
Born as Michikatsu Tsugikuni, Kokushibo is the twin brother of Yoriichi Tsugikuni, widely acknowledged as the most powerful demon slayer in history. The awakening of Michikatsu’s demon slayer mark filled him with dread, driven by the ancient belief that those who awakened it would meet an early demise.
Sensing his fear and the yearning to surpass his brother’s strength, Muzan presented Michikatsu with the option of immortality through demonhood. With a burning desire to escape his perceived fate and eclipse Yoriichi, Michikatsu ultimately embraced the dark side, thus earning the name Kokushibo. He became a groundbreaking figure, being the first demon to wield a breathing technique, specifically the Moon Breathing style.
Kokushibo played a critical role in Muzan’s relentless campaign against Sun Breathing users—the only group capable of defeating him. His loyalty and prowess led him to ascend to the Upper One Rank within the Twelve Kizuki, eventually serving as a fierce enforcer, as evidenced when he reprimanded Akaza for recklessly attacking Doma.
His pride and power cemented his status among the demons, rendering him exceedingly formidable. Additionally, his regenerative capabilities were second only to Muzan’s, granting him remarkable endurance in battle. This mutual regard fostered a unique partnership between Kokushibo and Muzan, creating an interesting dynamic of respect and utility.
Kokushibo’s Key Appearances in the Series
From his first appearance in the anime, Kokushibo exudes a stoic and composed demeanor. Communication with him is sparse, but when he does speak, his slow and powerful voice accentuates his intimidating nature, further unsettling the other demons in his presence.
In the manga’s Infinity Castle arc, fans are treated to a flashback showcasing the intense battle between Kokushibo and Yoriichi, which transpired four centuries before the main storyline. Just as Kokushibo prepared to deliver a decisive blow, Yoriichi succumbed to old age, leaving Kokushibo enraged at the loss of what could have been a fair fight.
Later in the same arc, Kokushibo engages in fierce combat against Muichiro, Genya, Sanemi, and Gyomei. Ultimately, they manage to behead the formidable demon, although this victory comes at a grave cost, with Muichiro and Genya perishing during the struggle to defeat Kokushibo while the survivors shift their focus towards Muzan.
In Conclusion
Kokushibo’s character is integral to the narrative of Demon Slayer, embodying both power and depth. His importance to Muzan stems from his status as the most potent demon in his arsenal. As the anime progresses, audiences eagerly anticipate the unveiling of Kokushibo’s true abilities, especially during the highly awaited Infinity Castle arc.
Fans are especially excited for the upcoming release of the Demon Slayer: Infinity Castle arc, where the Hashira and demon slayers will confront Muzan and his legion of demons in their most challenging battle yet.