The Dark Story Behind the Strongest Demon Character Kokushibo in DEMON SLAYER

Kapanlagi.com - Kokushibo, or his human name Michikatsu Tsugikuni, is one of the strongest and most tragic demon characters in the DEMON SLAYER series. His figure holds a past full of wounds that shaped his cruelty after becoming a demon. As the twin brother of Yoriichi Tsugikuni, the creator of the legendary Sun Breathing Technique, Kokushibo's life has never been free from the shadow of his brother.

Although he is a highly talented swordsman, Michikatsu was never able to match the clarity and glory radiated by Yoriichi. The burning jealousy drove him down a dark path: relinquishing his humanity for immortality and limitless power.

However, his story does not end there. Even as Upper Moon One, Kokushibo lived in deep regret until the end of his life. This regret was not only due to unfulfilled ambition but also because of the relationships and bonds that were shattered because of his own choices. Read the full story below.

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1. Twin Brothers of Light: Yoriichi and Michikatsu

The Dark Story Behind the Character of Kokushibo (credit: ufotable/Demon Slayer: Kimetsu no Yaiba)

Michikatsu was born at the same time as Yoriichi, but since childhood, he felt like an invisible shadow of his brother. Yoriichi was gifted with extraordinary talent in swordsmanship and breathing techniques, which made everyone focus on him, while Michikatsu was seen as "the ordinary one".

Despite this, Michikatsu never truly hated his brother, but feelings of inferiority and jealousy slowly developed into an obsession to surpass him. He decided to join the demon-slaying corps in pursuit of glory equal to Yoriichi, hoping that one day he could stand side by side or even surpass his twin.

2. The Beginning of the Fall: The Choice to Become a Demon

When Michikatsu realized that he was aging while Yoriichi remained young and strong, he began to feel increasingly frustrated. In order to maintain his strength and live longer to defeat his brother, Michikatsu accepted an offer from Muzan Kibutsuji to become a demon.

This transformation granted him immortality and extraordinary power, but it also erased the remnants of his humanity. From that moment on, he was known as Kokushibo, Upper Moon One, and one of the most fearsome demon slayers in DEMON SLAYER history.

3. Regret at the End of Eternal Life

The Dark Story Behind the Character Kokushibo (credit: ufotable/Demon Slayer: Kimetsu no Yaiba)

Although he became stronger as a demon, Kokushibo still could not match his brother, who remained superior even as an ordinary human until the end of his life. Kokushibo lived for hundreds of years, but in every victory he achieved, there was only emptiness because everything he had ever loved was left behind.

In his final moments, Kokushibo realized that his obsession had led him astray, destroying his own soul, and leaving him never truly satisfied. Even with all the power he possessed, he was unable to grasp true happiness.

4. The Tragedy of a Swordsman: The Lost Potential

As a human, Michikatsu actually had great potential to become one of the pillars of demon-slaying strength. However, his jealousy towards Yoriichi led him to choose a path of power that was easier but fraught with dark consequences.

Instead of becoming a protector of humanity, he turned into their greatest threat—known for his deadly moon breathing technique. He serves as a stark reminder that envy and ambition can transform someone into a monster, even if their initial intention was to become better.

5. Kokushibo in the Perspective of the DEMON SLAYER World

The Dark Story Behind the Character Kokushibo (credit: ufotable/Demon Slayer: Kimetsu no Yaiba)

In the world of DEMON SLAYER, the stories of demons are often filled with tragedy and deep regret, including Kokushibo. His backstory is considered one of the most heartbreaking, rooted in internal conflict and failure to accept oneself.

Without ever receiving the recognition he yearned for, Kokushibo only found emptiness. He proves that the power gained from suffering and jealousy will never bring peace.

6. Questions Related to Kokushibo's Dark Story

Q: Why did Kokushibo become a demon?
A: Because of jealousy and his desire to surpass Yoriichi, his twin brother, as well as his fear of death and human weakness.

Q: What is Kokushibo's real name?
A: Kokushibo's real name is Michikatsu Tsugikuni, the twin brother of Yoriichi Tsugikuni.

Q: What technique does Kokushibo use?
A: Kokushibo uses Moon Breathing, a unique technique he created himself after becoming a demon.

Q: Why is Kokushibo's story considered tragic?
A: Because his entire life was dominated by envy and ambition, ultimately leading him to lose his humanity, family, and peace of mind.

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(kpl/sjn)