The following contains spoilers from the Demon Slayer: Kimetsu no Yaiba manga and anime.

Summary

  • Infinity Castle movie will cover intense battles crucial for humanity's future and Muzan's downfall.
  • Shinobu faces a highly mismatched battle against Doma due to his strength and her lack of a Demon Slayer Mark.
  • Shinobu must find a unique way to surprise and defeat Doma, relying on strategy over strength.

Demon Slayer: Infinity Castle movie is all set to cover the eponymous arc that features some of the most intense battles of the series and sets the stage for an epic showdown with the Demon King. Each fight is expected to be critical for the future of humanity and will eventually play a crucial role in Muzan's downfall.

The official trailer has hinted at three major battles so far. Among them, Doma versus Shinobu Kocho seems to be the most mismatched, since Doma is significantly stronger than most demons, with the exception of Kokushibo. Furthermore, unlike Tanjiro, Shinobu has not yet manifested a Demon Slayer Mark. With so many disadvantages, does Shinobu even stand a chance?

Demon Slayer Every Fight That Will Happen In the Infinity Castle Arc
Demon Slayer: Every Fight That Will Happen In the Infinity Castle Arc, Ranked

The Infinity Castle arc is an intense one. It features many exciting fights from Demon Slayer.

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Understanding Shinobu's Antagonism for Doma

Insect Hashira Detests Doma For Killing Someone Special

Shinobu was born in a privileged family and lived a peaceful life during her formative years. Her parents loved her deeply, and she also had the guidance of her elder sister, Kanae. The Kocho family was doing great, but their hopes and future were snatched away when a demon managed to get into their house one night. Shinobu's parents put themselves in harm's way to protect their children. While they succeeded in stopping the demon for a while, they ended up losing their lives in the process.

I once believed that the road of happiness continued forever and ever into the distance. When it was destroyed, I realized for the first time that it lies upon a thin sheet of glass. And just as we were saved, there were those whose happiness that haven't yet been destroyed. So I wanted to get stronger and protect them. That's what we promised each other. Even if we're weak and can't cut off demon heads, if we defeat one demon, we can save dozens of people. And if we can defeat an Upper Rank Kizuki, we can save hundreds. It isn't about whether we can or cannot do. There are things we have to do.

Shinobu and Kanae would have met the same fate had Stone Hashira Gyomei Himejima not arrived at the scene just in the nick of time. After their rescue, he trained the Kocho sisters, and they eventually ended up becoming the Hashira. After losing both parents, Kanae meant everything to Shinobu, and the two sisters wanted to make the world a better place by eradicating demons. But tragedy struck one more time and changed Shinobu forever.

On one unfortunate night, Kanae accidentally ran into Upper-Rank Two, Doma. Since she was alone, the Flower Hashira was pushed to fight or perish. Although she displayed remarkable bravery, she was too underpowered to fight an Upper Moon. Doma seriously injured Kanae and would have devoured her alive if not for the sunrise. By the time Shinobu arrived at the scene, her sister was already taking her last breath. Kanae asked Shinobu to leave the Demon Slayer Corps and not think of revenge, as she feared that she, too, would meet the same fate as her.

Infinity Castle Movie Will Reveal Who is Stronger

Shinobu Faces Her Biggest Battle Yet

Insect Hashira Shinobu Kocho is not the strongest demon slayer of her generation. In fact, she admits that her short stature and unremarkable strength put her at a disadvantage. That's why she had to invent the Insect Breathing that mimics insects and relies heavily on lethal wisteria-based poisons to subdue the enemy. While the technique can send a shiver down the spine of most demons, it becomes less and less effective against stronger adversaries.

Tanjiro-featured-image-Demon-Slayer
Demon Slayer: 6 Most Anticipated Battles In The Infinity Castle, Ranked

The Infinity Castle is considered one of the best arcw in the Demon Slayer manga. Here are the fights fans are anticipating in its anime adaptation.

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Shinobu's antagonism toward Doma drives her to confront the demon in the Infinity Castle. If the trailer is to be believed, she is all set to fight him alone. As mentioned before, the Flower Hashira has not manifested a Demon Slayer Mark yet. This puts her at a serious disadvantage since a demon slayer with the mark would have also struggled against someone of Doma's stature.

Until now, Shinobu's poison has done wonders against weaker enemies, but it is improbable that the same dosage will work on Upper Rank Two. On the other hand, Doma's blood demon art is extremely dangerous. In fact, it could incapacitate even the best demon slayers if they are not vigilant around him. Even if one survives Cryokinesis, they will have to deal with Doma's Tessenjutsu, abnormal regeneration, and a host of other powers that make him seem invincible.

Shinobu vs doma in infinity castle arc

Shinobu Kocho will have to find a unique way to surprise Doma, but even doing that will take an almost perfect plan combined with perfect execution. Tricking Doma is probably the only hope for her, and even that seems highly unlikely. But it would be foolish to underestimate Shinobu, who has always known that she will be fighting her sister's killer someday.

The Flower Hashira is known for being extremely smart, and it appears that the fate of her battle will be more about strategy and less about strength. If she manifests the Demon Slayer Mark, it would change everything dramatically and might just give Shinobu the edge she needs. It remains to be seen how the battle unfolds and what tricks Shinobu has up her sleeve that will tip the scales in her favor.

Demon Slayer: Infinity Castle trilogy's first installment is scheduled to be released in the United States on September 12, 2025.

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Demon Slayer: The Weakest Hashira, Explained

The Hashira might be the Demon Slayer Corps' strongest fighters, but even they have a weak link.

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Demon Slayer
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Release Date
April 6, 2019
Network
Adult Swim
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Studio
ufotable
Creator
Koyoharu Gotoge
MyAnimeList Score
8.26 (Hashira Training Arc)