Demon Slayer has captured the hearts of anime enthusiasts worldwide with its rich characters and captivating storylines. While the primary focus often lands on the protagonists, an intriguing group has emerged among the supporting characters: the Kasugai crows. Their unique traits and contributions to the series have sparked the interest of many fans.
These crows serve a crucial role in facilitating communication within the ranks of the Demon Slayer Corps. What sets them apart is their ability to speak, a feature that has led to speculation about their origins and characteristics. This article explores a theory regarding these remarkable creatures and their connection to a pivotal figure in the series.
Disclaimer: This article contains speculative theories and reflects the author’s views.
The Mysterious Origins of the Kasugai Crows

From their introduction in the early episodes, Kasugai crows have been integral to the Demon Slayer Corps. Each slayer, from the elite Hashira to the more novice members, is partnered with a crow that typically accompanies them on their missions. This unique relationship provides a convenient means for relaying vital information.
Fans have noted the peculiarities surrounding these crows, particularly their human-like speech and intelligence. A plausible theory suggests that the crows are not ordinary birds but rather hybrids, potentially the result of Tamayo’s experiments to support the Corps. In the manga, Tamayo has previously transformed Chachamaru into a demon, hinting that similar transformations could apply to animals.

While Tamayo’s involvement offers a compelling justification for the existence of the Kasugai crows, an alternative theory suggests a different origin. Some speculate that an unnamed doctor, responsible for Muzan’s transformation into a demon, might have conducted experiments on a crow. This crow could have given rise to the current generation of intelligent Kasugai crows.
Given that the Ubuyashiki family founded the Corps to combat demons, it’s conceivable that their longstanding interactions with the crows were kept under wraps. Furthermore, the alliance between certain demons and the Corps may hint at a deeper connection and understanding between the species.
Concluding Remarks
Throughout the series, the significance of the Kasugai crows has become increasingly evident. They have not only assisted the Hashira during pivotal battles, but they also facilitate fluid communication among demon slayers. Their notable intelligence further enriches the narrative.
As key characters like Tanjiro venture into the Infinity Castle, the presence of these crows underscores their loyalty and purpose. The potential role of the Kasugai crows in the climactic battles ahead remains an exciting prospect for the show’s loyal viewers.