Demon Slayer: Kasugai Crows connect Tamayo to the Corps in a way nobody saw coming

Fan theory connects Tamayo and the Demon Slayer Corps through the Kasugai Crows (Image via Ufotable)
Fan theory connects Tamayo and the Demon Slayer Corps through the Kasugai Crows (Image credits: Ufotable)

Demon Slayer has one of the biggest and most passionate fanbases in the world. These fans often take to social media websites to put forth their opinions on various aspects of the animanga series. We have seen netizens cosplay some of their favorite characters and produce art pieces inspired by this title. However, fans also engage in countless discussions and debates, with fan theories being one of the most common topics within the anime and manga community.

In essence, fan theories attempt to explain something that is shrouded in mystery, or connects two seemingly unrelated dots. One of the most popular theories on the internet connects the Kasugai Crows, the Demon Slayer Corps, and Tamayo. The latter is one of the most underrated characters in the manga series. Her participation was crucial towards the end of the manga. Coming back to the fan theory, this particular one hinges on certain assumptions made about the Kasugai Crows.

Tamayo as seen in the anime series (Image credits: Ufotable)
Tamayo as seen in the anime series (Image credits: Ufotable)

It is quite common in anime titles to have elements that aren’t thoroughly explained. Sometimes, this leads to plenty of plot holes which can be confusing. Naruto is infamous for such issues because of the sheer number of elements that weren’t explained. In this case, however, the Demon Slayer title seems to have one similar element and that is the Kasugai Crow.

Kasugai Crows are special crows that can talk and are assigned to each demon hunter. Their job is to relay crucial information and alert them about the nearby demonic activities. Each Kasugai Crow often has a similar personality to the demon hunter they are assigned to.

However, nobody knows the crows’ origins or how they achieved these powers. The theory in question proposes the idea that Kasugai Crows are the result of Tamayo’s experiments. We already know that Tamayo managed to turn a cat into a demon. This indicates that she has been experimenting on animals and it is unlikely that the cat was the only subject.

If there is any resemblance to magical abilities, it is implied that the ability in question is demonic in nature. Therefore, Tamayo’s experiments in Demon Slayer could have created crows with the ability to converse. If that were the case, there was a high chance that she was approached by the Demon Slayer Corps to create these Kasugai Crows to better aid the demon hunters on the battlefield.

Disclaimer: This section of the article contains spoilers from the manga chapters.


Tamayo’s contribution to the Demon Slayer Corps

As mentioned earlier, Tamayo is one of the most underrated characters in the Demon Slayer series. She barely received any screen time in the manga. However, she utilized it exceptionally well. There is no way that demon hunters would be able to take on Muzan and defeat him, if not for Tamayo’s contribution. She created a multi-stage drug in collaboration with Shinobu Kocho. This drug quite literally stopped Muzan from fleeing and aged him aggressively.

Therefore, the demon hunters were able to engage him in a fight until sunrise, and that is what finally claimed Muzan’s life in the manga. Furthermore, she was responsible for Nezuko conquering the sunlight in Demon Slayer. Tamayo constantly analyzed the blood composition of Upper Moon demons and crafted drugs that didn’t just help Nezuko conquer the sun, but also revert to her human self.


In conclusion, Tamayo has her connections to the Demon Slayer Corps through multiple contributions. However, fans have reason to believe that she was responsible for the creation of Kasugai Crows as well. We urge the fanbase to take this information with a grain of salt as it is a fan theory and the source material has no explicit mention of the same.

Edited by Amey Mirashi