For more than 20 years, Eiichiro Oda has carefully created an extensive universe full of mysteries, charming characters and incredible powers. A piece; an adventure with more twists and turns than any manga in history. However, even the most renowned creators seem to be immune to the occasional slip-up. With a story this big, there are bound to be a few inconsistencies – no matter how hard we try to explain them away.
One of these more recent debates among fans concerns Haki and its ability to reverse or nullify the powers of the Devil Fruit. Since we have seen Haki do some incredible things, some fans wonder if Haki could reverse permanent changes made by Devil Fruits such as Toki’s Toki Toki no Mi or Shinobu’s Juku Juku no Mi. Although it doesn’t make sense logically, the Wano Arc of A piece presented differently.
Haki’s questionable powers in A piece
During the Wano Arc of A pieceIt was highlighted that large amounts of Haki can reverse and nullify the Devil Fruit’s powers. And this concept is expanded upon even further in the Egghead Arc. Therefore, this concept led fans to theorize about Haki’s potential: if enough Haki could negate the Devil Fruit’s powers, could it theoretically reverse the permanent changes caused by them?
The gaps in this concept can be better illustrated by looking at the transformation of Kouzuki Momonosuke. u/great_holt recently hosted a discussion on Reddit that attempted to analyze the effects of Haki in reversing Devil Fruit powers.
Shinobu’s Juku Juku no Mi aged Momonosuke’s body, effectively trapping him in an adult form. Some fans argued that if Haki could truly neutralize Devil Fruits, it might be possible to reverse Momo’s transformation and return him to his original, childlike state.
However, this theory is contradicted by the story itself. Despite the overwhelming power of Haki, Momo’s condition remains unchanged. This suggests that Oda considers certain Devil Fruit effects to be permanent, making her immune to even the most advanced forms of Haki.
Eiichiro Oda’s inconsistency in A piecePlot
One of the core topics that A piece Fans have brought up the inconsistency in the way Devil Fruits are affected by Haki. Using Haki to block or negate Devil Fruit abilities seems to only apply to powers that don’t create permanent changes.
For example, Law’s ability to teleport people or Doc Q’s female hormone disease that can be reversed are both temporary effects that Haki can negate. However, when it comes to powers like Toki’s time jumps or Shinobu’s aging, these changes are presented as irreversible.
Here, some fans believe that the inconsistency is just a matter of plot expediency. Although Eiichiro Oda is a gifted storyteller, his story spans more than 1000 chapters. There will definitely be recurring contradictions between different aspects of a story of this length. Fans have noticed that Oda does not always put logical consistency above emotional impact; something that many have now accepted.
The permanence of Momo’s transformation and the irreversible effects of the Juku Juku no Mi and Toki Toki no Mi may have less to do with the rules of the A piece universe and more about the direction Oda wants to take the story.
After all, no story is perfect, and that’s absolutely fine. Even Oda, revered as “Goda” for his godlike presence in the manga industry, makes occasional missteps – but what matters most is the emotional and thematic depth of A piece that will continue to resonate with fans for a long time to come.
A piece is currently available on Crunchyroll.
