Sanji will get Conqueror's Haki by One Piece's end (& his logical next Jambe form is why)

One Piece has always used fire as a symbol for Sanji’s growth, and by the end of Oda’s series, it could very well ignite something even greater—Conqueror’s Haki. Each form of Sanji’s Jambe reflects a deeper transformation, not just in terms of power, but in terms of spirit. The orange flames of Diable Jambe to the blue flames of Ifrit Jambe represent a more refined and intense will being reached.

Now, assuming the next form is Asmodeus Jambe, which is the name of the Demon King of love, it connects directly to Sanji’s core identity and his main passion. An upgrade as powerful and passion-fueled as this perfectly fits with the narrative behind Conqueror’s Haki serving as an empowering force to take him even further. Sanji’s fate may ignite a flame of existence greater than any fan’s expectation and may soon conquer more than just his enemies.

Disclaimer: This article is a speculative theory and reflects the writer's opinion. It also includes spoilers from the One Piece anime/manga.

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How Sanji will get Conqueror's Haki by One Piece's end, explained

Sanji’s journey in One Piece has always burned with progression—literally. His fire-based fighting style is not just advancing in terms of heat, but in terms of symbolism as well. Each form progresses him forward to something much greater than himself as he evolves. Diable Jambe was just the start; its orange flames represented raw rage and justice. Ifrit Jambe came next—blue and blazing—made possible through Sanji’s enhanced exoskeleton and mastery of Armament Haki. But this can’t be the end.

The next logical step—Asmodeus Jambe—may ignite with violet flames, hotter than any before, and that level of heat demands more than biology or Armament. It requires something rarer, something divine in the One Piece world: Conqueror’s Haki.

Sanji’s upgrades follow a deliberate path. Diable Jambe means Devil Leg, while Ifrit Jambe is named after destructive Islamic fire spirits. Asmodeus, however, is a Demon King. This evolution isn’t just thematic—it’s hierarchical. From devil, to demon, to king. That final title—King—isn’t accidental. In One Piece, “king” always connects to Conqueror’s Haki. It’s the will to dominate, to lead, to defy fate.

If Asmodeus Jambe is real, it wouldn’t just be hotter than Ifrit; it would symbolize Sanji’s claim to that throne of willpower. To handle violet flames, hotter than 1600°C, his body alone wouldn’t suffice. He would have to cover his leg in Conqueror's Haki—the very fire of kings—to control and utilize that heat without self-destruction.

However, there is more than mere temperature at stake. Asmodeus is no ordinary demon—he is fixated on love, supposedly killing out of passion for a human woman named Sarah. This is exactly the nature of Sanji. He battles, bleeds, and endures for love. His passion for women, his loyalty to friends, his defense of innocents—all stem from love. If he achieves the standing of Asmodeus Jambe, it will not be simply fire; it will be fire powered by love, consuming with the same emotional power witnessed throughout One Piece.

This concept of "The Power of Love" is not exclusive to Sanji. Garp punches with the "Fist of Love." Whitebeard created a family through love. Vegapunk proclaimed love as creation's key. And of the One Piece legendary characters, Scopper Gaban, the "Preacher of Love," encapsulates this motif. Gaban is said to possess Conqueror's Haki and was spotted with a black lightning effect on his weapon. His stance is reminiscent of that of his captain—Gol D. Roger—the one who embodied kingly will.

Compare that to Sanji. He is the only Straw Hat who fully embodies chivalry. He battles due to his concern, not ego. He cooks to feed, not for glory. That is love-motivated action. Gaban as the “Preacher of Love” is what Sanji might grow into—a “Prince of Love” who commands not with brute strength, but with compassionate fire.

Gaban as seen in One Piece anime (Image via Toei Animation)

If Gaban uses Conqueror’s Haki to preach love through strength, Sanji can do the same, but through flame. Asmodeus Jambe would be more than a new move. It would be Sanji’s awakening—his declaration that love itself can be a king’s power.

There’s also narrative justification. Zoro already possesses Conqueror's Haki and inherited a legacy from Ryuma. Luffy is a reincarnation of Joy Boy. Sanji, being in the monster trio, deserves a similar fate. Conqueror's Haki is not merely about commanding others—it's having an unbreakable will.

Sanji has exhibited that will again and again. He survived hell with Zeff, humiliation in Whole Cake Island, and brutal self-restraint against Queen. He's rejected his Germa tweaks in favor of maintaining his humanity. That refusal to lose himself is the very essence of kingly will.

If Asmodeus Jambe is the end of Sanji's fire path, then violet flames are the logical representation of that journey. They are hotter, rarer, and deeply representative in nature. Violet is a color of royalty and inner strength, and it's certainly appropriate for a man like Sanji, whose strength is driven by a set of ideals instead of his ambition.

Ifrit Jambe was only accomplished by the melding of augmented DNA and Armament Haki. Violet flames will require something beyond DNA or technology. They will require nothing but willpower—Conqueror's Haki, with the intent not to overcome other individuals, but to protect the things Sanji cherishes.

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Final thoughts

The story of One Piece has long implied that the ultimate power isn't simply might, but meaning. The flames Sanji controls are evolving into something more than technique; they are evolving into philosophy. Asmodeus Jambe, if the event happens, will represent the very moment Sanji takes his final form.

Not merely the cook of the future Pirate King, but a king in his own right—a king of love, a king of loyalty, and a king of unshakeable will. And that is exactly what Conqueror's Haki is for.

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Related links:

• Imu may have returned the Giants to their original forms in One Piece chapter 1150
• Imu's abilities in latest One Piece spoilers may be inspired by this beloved movie
• The One Piece anime has Boruto beat in one major area