The following article contains major spoilers for Demon Slayer's final arc.
Summary
- The final arc of Demon Slayer has a huge plot twist - the most powerful demon is not Muzan.
- Demon King Tanjiro displays strong abilities such as immunity to sunlight and rapid regeneration.
- The Demon Slayer Corps may not have defeated Demon Tanjiro if he fully transformed, but were saved by quick action.
The Demon Slayer: Kimetsu no Yaiba anime is heading towards the final battle. The first movie in the Demon Slayer: Infinity Castle Arc trilogy will begin to adapt the climax of the story, and it will feature some great battles.
As the Demon Slayer Corps storm into Muzan's lair, they will face the strongest demons out there. The first movie will likely include an emotional battle between Tanjiro and Akaza, and Tanjiro will finally avenge Kyojuro Rengoku. However, the second half of the arc takes an unexpected turn, introducing the most powerful demon ever — and, surprisingly, it's not Muzan.
Demon Slayer: Infinity Castle Will Feature An Emotional Moment Related to Rengoku Kyojuro
Kyojuro Rengoku is one of the most beloved characters in Demon Slayer, and he will "return" in some way in the trilogy.
The Final Arc Has A Huge Plot Twist
In the Infinity Castle Arc, the Demon Slayers Corps invade the Infinity Castle, which is controlled by Nakime and serves as the true lair of Muzan. With the goal of finding and defeating Muzan, the Demon Slayers split up and storm into the castle. After many great battles and major losses, they finally corner Muzan. Meanwhile, Tanjiro and Tomioka finally kill Akaza, avenging Rengoku, who died early in the series.
After Nakime is killed in a plot twist, the castle begins to crumble. Muzan then runs away, and the remaining members of the Demon Slayer Corps go after him. Meanwhile, Nezuko waits far away for the antidote to take effect so that she can turn back into her human form. The Demon Slayers have the upper hand in the final battle against Muzan. However, realizing his imminent defeat, Muzan resorts to his final trick — one that brings the most powerful demon ever seen onto the stage.
The Most Powerful Demon Is Not Muzan
Muzan realizes that he is going to be defeated, but he refuses to let his dreams die with him. Desperate, he injects his blood into Tanjiro to turn him into a demon, known as Demon King Tanjiro. While the outside Tanjiro attacks his friends, the inside Tanjiro fights his own battle against Muzan. Muzan tries to convince Tanjiro to give up his mortal form and embrace immortality as a demon.
If you become a demon, you can live forever.
— Muzan Kibutsuji
Nezuko arrives at this point and aids the Demon Slayers in convincing Tanjiro not to give himself up to Muzan. Tanjiro is attacking his former peers while resisting Muzan in his mind. Fortunately, they manage to inject Tanjiro with the antidote before it's too late.
How Strong Is Demon King Tanjiro?
Apparently, Tanjiro didn't fully transform into a demon before he was turned back into a human, but we could see a glimpse of his potential. First of all, Demon King Tanjiro was immune to sunlight, giving him a huge advantage compared to the other demons shown in the series. He could also regenerate at an astonishingly fast pace. Furthermore, he was very strong and could apparently assume different forms, just like Muzan.
Had Tanjiro fully become a demon, he would likely have improved his abilities and perhaps acquired new skills. Demon Tanjiro could have achieved Muzan's dream of immortality if the Demon Slayers Corps hadn't been quick enough.
Could The Demon Slayer Corps Have Defeated Demon Tanjiro?
Giyu Tomioka states that Tanjiro's immunity to sunlight means he was probably resistant to the Bright Red Nichirin Swords. Resistance does not mean the Nichirin blades wouldn't work, but they would have a hard time. Considering the strength Demon King Tanjiro displayed during his brief existence, it seems unlikely that the Demon Slayers could have defeated him had he fully transformed.
Perhaps the legendary Yoriichi could have defeated him, since Muzan states that Tanjiro was far behind Yoriichi as a Demon Slayer. However, since Yoriichi is long dead, the Demon Slayers were fortunate to be able to quickly inject the antidote and prevent a calamity.
Demon Slayer: Kimetsu no Yaiba is available to stream on Crunchyroll and other services. The Demon Slayer: Infinity Castle movie will be released in the US and Canada on September 12, 2025.
- Release Date
- April 6, 2019
- Network
- Adult Swim
Based on Koyoharu Gotouge's shonen manga, Demon Slayer: Kimetsu no Yaiba is an action anime set in Japan during the early 20th century. Seeking revenge for the murder of his family while also looking to save his sister, Tanjiro joins the Demon Slayer Corps as they try to eradicate Demons led by Muzan.
- Studio
- ufotable
- Japanese Title
- Kimetsu no Yaiba
- Based On
- Manga
- Creator
- Koyoharu Gotoge
- Number of Episodes
- 63
- Streaming Service(s)
- Crunchyroll, Hulu, Netflix
