The intrigue surrounding the Fire Devil in “Chainsaw Man”continues to captivate fans, especially following the recent revelations about the Death Devil and the mysterious Fakesaw Man. Despite being well into chapter 199, the true nature of the Fire Devil still eludes definitive understanding. What has been established is that contracts with the Fire Devil empower contractors to transform into their deepest desires.
This has sparked considerable speculation regarding the identity of the Fire Devil. While many fans have pointed to Seigi Akoku as a potential candidate, a closer examination suggests that Fumiko Mifune might actually be the more plausible option. This article aims to delve into this theory.
Disclaimer: This article is a speculative theory and reflects the writer’s opinion.
The Fire Devil: Reconsidering the Characters of “Chainsaw Man”

Before focusing on Fumiko Mifune, it’s essential to rule out other likely candidates from the roster of “Chainsaw Man”characters. Starting with less likely possibilities, Yuko is considered a nominal candidate for the Fire Devil, but her tragic backstory indicates otherwise. Asa Mitaka’s bullies also seem to lack the depth and relevance needed for such a complex role, given their limited screen time and connection through school demographics alone.
Another notable character is Hirofumi Yoshida. Although intriguing, his unwavering dedication to Public Safety and overt opposition to the Death Devil undermine any claims of him being the Fire Devil. Haruka Iseumi presents another tantalizing option; however, there’s a strong argument that he may simply be portrayed as a frightened pawn caught in the web of governmental intrigue.
Seigi Akoku is frequently mentioned as the primary suspect for the Fire Devil thanks to his similarities with Agni—a character from Fujimoto’s “Fire Punch,”which literally translates to “Fire.”Yet his role is largely supportive, with minimal dialogue and appearances throughout Part II. This could lead readers to interpret him as a deliberate misdirection, diverting attention away from the true identity of the Fire Devil.

Fumiko Mifune: The Most Likely Candidate for the Fire Devil
Having considered other contenders, attention turns to Fumiko Mifune, whose enigmatic presence remains largely unexamined despite the unfolding storyline. Intriguingly, her voluntary sacrifices to the Aging Devil could hint at the Fire Devil’s transformative powers, aligning with the notion of gaining a human-like appearance through contracts.
Furthermore, there have been assertions that individuals can “feel the Justice Devil within,”suggesting that the Fire could similarly invade the consciousness of its contractors. If this is the case, one could speculate that Fumiko’s double in the Aging Devil Arc might actually represent Fire temporarily taking on a different contractor’s form. This possibility hints at a connection between Fumiko and Fire, each existing in a shared, complex relationship.
Additionally, Fumiko’s fluctuating moods could hint at a duality between her and the Fire Devil, reminiscent of the dynamic between Asa and Yoru. Another noteworthy point lies in Fumiko’s unique eye characteristics, which frequently signify the presence of a devil or hybrid entity in “Chainsaw Man.”Such details reinforce the hypothesis that she might embody or be closely linked to the Fire Devil.
Conclusion: The Veil of Mystery Surrounding the Fire Devil

In summary, while much of the “Chainsaw Man”community speculates that Seigi Akoku is the Fire Devil, a more nuanced exploration suggests that Fumiko Mifune might actually be a stronger candidate. Her peculiar behavior, emotional volatility, and unique encounters with various Devils—including her interaction with the Aging Devil—raise intriguing questions about her true nature.
The available evidence seems to sync well with the Fire Devil’s known traits, such as granting contractors the ability to transform driven by desire and potentially invading their consciousness. Until we receive official confirmation, Fumiko’s possibility as the Fire Devil must remain on the table. Fujimoto’s talent for weaving complex narratives and red herrings keeps fans engaged and alert as the saga continues to unfold.