One Piece Theory: Imu Is the Original Sea Devil and Joy Boy's Dark Twin

WARNING: This article contains spoilers for One Piece Chapter 1179.

One Piece Chapter 1179 finally shattered eight years of mystery by revealing the true form of São Nerona Imu, the King of the World. And what we saw doesn't just answer questions — it raises a theory that could rewrite the entire history of the Void Century.

The Revelation: Imu Is Not Human

Chapter 1179 officially introduced Imu with a text box confirming his title: "São Nerona Imu, King of the World, one of the Twenty Founders of the World Government". But his physical appearance is what shakes the foundation of the lore:

• Dark tanned skin — identical to the Lunarian race (like King)
• Long white hair — a trait shared with Lunarians
• Large wings — the defining characteristic of Lunarians
• Curved horns in an "S" shape — similar to Kaidou and the Ancient Giants
• Demonic tail — the same one that pierced Sabo
• White circular tattoos all over the body — including an eye on the right hand and a facial tattoo on the left side, identical to King's pattern
• Black Hagoromo-type clouds with eyes, similar to Awakened Zoans but with a biblically accurate angel (ophanim) aesthetic

Blood dripping from the left side of his mouth in the final panel suggests this form has a devastating physical cost.

THE THEORY: Imu Is the Original "Sea Devil" — Joy Boy's Dark Twin

This is where everything connects. This isn't just a theory about what Imu is — it's a theory about the origin of Devil Fruits, the Void Century, and the true nature of the One Piece.

Premise 1: The Forbidden Hybrid

Imu is a Lunarian–Ancient Giant hybrid — two races that were once considered gods. Lunarians inhabited the top of the Red Line (where Mary Geoise now stands) and were called "gods." Ancient Giants possessed unmatched destructive power.

This forbidden crossbreeding would explain:

• His supernatural longevity (800+ years)
• His overwhelming Conqueror's Haki that makes structures in Elbaf "come alive" with evil faces
• Why the World Government exterminated both races — to erase all evidence of what Imu truly is

Premise 2: Imu Was Joy Boy's Vice-Captain

What if Imu was to Joy Boy what Zoro is to Luffy?

The evidence is chilling:

• Imu knows Joy Boy personally — he screamed in agony upon sensing his Haki 800 years after his death
• Imu knows who Davy D. Jones was — a level of knowledge only someone from the inner circle would have
• Imu recognizes Nefertari D. Lili by her full name, suggesting a direct relationship
• The giant straw hat stored in Mary Geoise — a memento of his former captain?

Imu's betrayal wasn't about power — it was ideological. Joy Boy wanted liberation; Imu believed the world needed absolute control to survive.

Premise 3: Imu Created the Devil Fruits

Chapter 1179 confirms Imu possesses a "Special Devil Fruit that cannot be categorized" by the standard Paramecia/Zoan/Logia system. What if it can't be categorized because it's the tree from which all others are born?

Consider:

• The name "Devil Fruits" — named after the demonic being who created them?
• The legend of the "Sea Devil" who curses users to be unable to swim — is Imu literally that devil?
• Imu has a demon tail, horns, and an infernal presence — he visually fits the description
• The Mother Flame and its relationship to Imu: the number 16 (Imu = 1-6 in Japanese goroawase) matches the 16 beams fired by the ancient weapon
• If Imu can produce Devil Fruits, that would explain how the Gorosei obtained such specific Mythical Zoans — he gave them directly

Premise 4: The "D" Is the Mark of Those Who Resisted

Nefertari D. Lili was one of the Twenty Founders but refused to become a World Noble. According to Imu, she committed a "great mistake" by scattering the Poneglyphs across the world. The "D" in her name became the mark of all those who inherited the will to resist — the "Natural Enemies of God."

But here's the crazy part: if Imu was originally part of the Ancient Kingdom, then the "D" might stand for "Demon" — not as an insult, but as a reminder. D-bearers are the descendants of those who fought against the original demon. The "D" is the scar left by Imu's betrayal.

Premise 5: The One Piece Is Proof of All This

If Joy Boy knew he couldn't defeat Imu in his era, he left something on Laugh Tale: the complete story of the betrayal, the truth of the Void Century, and probably the weapon or method to destroy Imu's power once and for all.

Roger laughed because he understood he had arrived too early — he needed someone with the Nika Fruit, the only one Joy Boy specifically designed to counter Imu's power. Luffy didn't choose his fruit by accident — Joy Boy created it as his final move against his former vice-captain.

The Blood on His Mouth: The Fatal Weakness

The most revealing detail from Chapter 1179 is the blood dripping from Imu's mouth. After 800 years of apparent invulnerability, this is the first sign that Imu's power has a limit.

If his Devil Fruit is truly the source of all others, every time a fruit "awakens" in the world, it could be draining the source power. With the Gorosei using their Awakened Zoans, Luffy in Gear 5, and dozens of users deploying powers simultaneously — Imu is weakening for the first time in eight centuries.

Timeline of the Betrayal

Why This Theory Has Solid Ground

It's not just wild speculation. Every point is supported by manga evidence:

1. Imu's physical traits confirm the connection to both races (Chapter 1179)
2. Imu's emotional reaction to Joy Boy's Haki suggests a personal relationship, not just enemies
3. The "uncategorizable" Fruit is the first time in 1,179 chapters the classification system doesn't apply
4. Oda has established the betrayal pattern: Kanjuro/Kozuki, Blackbeard/Whitebeard, and now Imu/Joy Boy on a cosmic scale
5. The etymology of "Imu" = 1-6 = 16 beams from the Mother Flame is too precise to be a coincidence
6. The giant straw hat in Mary Geoise makes no sense unless Imu had a direct connection to its original wearer
7. The tattoos identical to King's confirm Lunarian heritage

Conclusion: One Piece's Ending Is Already Written

If this theory is correct, One Piece's climax won't just be a battle of fists — it'll be the closing of an 800-year cycle of betrayal. Luffy, carrying Joy Boy's will and the Nika Fruit specifically designed against Imu, will face the demon who was once his predecessor's ally.

The supreme irony: Imu created Devil Fruits to control the world, and he'll be defeated by the only fruit he could never control — the fruit of absolute freedom.

What do you think of this theory? Do you believe Imu was really Joy Boy's companion? Leave your thoughts in the comments.