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Warning – Major story spoilers ahead
Japanese anime series “Demon Slayer: Kimetsu no Yaiba” fans need no refresher on who Muzan Kibutsuji – the ultimate demon boss, practically the first vampire-like monster who created the rest of his brood by sharing his blood. And viewers finally get to know about his origins in the season finale of “Demon Slayer Swordsmith Village Arc“.
Muzan traces his human life back to the Heian era (between 794 and 1185), when he was a young noble suffering from a mysterious terminal disease that could kill him before his 19th birthday. A doctor concocts various medicines to cure his affliction, but nothing seems to work. Mad with helpless rage, Muzan kills his doctor one day, but the timing couldn’t have been worse. As it turns out, the doctor’s medicines were beginning to take effect, not only improving Muzan’s health but also granting him superhuman strength. However, as a crippling side effect, Muzan finds himself unable to step out in the sun. Thus begins his quest to find the “Blue Spider Lily,” a rare flower that he believes can restore his ability to face daylight. To aid in his search, Muzan creates more of his kind: demons who kill humans and carry out his bidding.
Thousands of years later, Muzan’s search for the rare flower finally comes to an end, not because he finds it, but because a demon who can withstand the sun is discovered. In the final episode of the “Swordsmith Village Arc,” Tanjiro Kamado’s sister, Nezuko, is shown burning from the first rays of dawn. However, she soon overcomes the scalding and becomes able to walk comfortably under the sun. Muzan is exhilarated to finally find a demon who has conquered the sun and vows to devour Nezuko in the hopes of inheriting her resilience!
Until now, Tanjiro was merely a junior slayer, performing exceptionally well in his fight against demons. However, he now becomes a direct adversary for Muzan Kibutsuji. Things are going to get a lot more personal and bloodier in the next season!