Imu & Joy Boy Theory: Why Luffy Triggers Her Memory

Chapter 1188 just dropped a bombshell: Imu pierced Luffy with a blade called the “Void Sword” — and the chapter opened with a flashback nobody saw coming. Imu, as a child, accidentally connected with Joy Boy over a Den Den Mushi call. If this theory is correct, it reframes everything we thought we knew about why Imu keeps calling Luffy by Joy Boy’s name — and it has nothing to do with the Sun God Nika at all.

The Theory

The stakes here are enormous. If Imu is instinctively drawn to Luffy not because of a physical or Devil Fruit resemblance, but because of an inherited will that transcends death, then One Piece’s central theme — that a person lives on through the will they pass down — is playing out at the highest level of the story’s conflict. The world’s most powerful tyrant is being haunted by the ghost of the man she once knew, reborn in the boy she now wants dead.

Evidence from the Manga

1. Chapter 1188: The chapter opens with a flashback depicting the first meeting between Joy Boy and Imu — not face to face, but through an accidental Den Den Mushi connection. Both speak with the innocence of children: Joy Boy shouts “Hello!! Hello!! Respond!!” and Imu answers hesitantly. Crucially, Joy Boy’s phrasing — “respond” (応答せよ) — mirrors Dr. Vegapunk’s broadcast to the world in Chapter 1108, suggesting Joy Boy may have been transmitting to the entire world, not a single target.
2. Chapter 1188: Imu is shown to be confused and frustrated by her own reaction to Luffy. The manga makes clear she does not understand why Luffy reminds her of Joy Boy. This is critical — if the resemblance were physical, or tied to the Nika transformation, Imu would recognize the reason immediately. Instead, the trigger is invisible and instinctive, pointing directly to the “inherited will” concept.

📌 Key Evidence: Imu says to Luffy before impaling him: “Joy Boy wouldn’t be this weak.” She knows Luffy is not Joy Boy — and yet she cannot stop seeing him there. This confirms the trigger is not the Nika form itself, but something deeper that even immortal Imu’s rational mind cannot locate.

3. Chapter 576: The phrase “a will passed down through the ages” is invoked in connection with the inherited will concept. Luffy has no blood relation to Roger or Joy Boy — the connection is purely one of will, making the parallel between how Roger’s former crewmates (Crocus, Gaban) react to Luffy and how Imu reacts to him structurally identical.
4. Chapter 1181: During the fight with Roki in Nidhogg form, Luffy successfully blew Imu away with “Raikai” (Thunder Realm). In Chapter 1188, Imu — now fighting Luffy more seriously than she did Roki — begins using future sight that surpasses Luffy’s own, and deploys her “Void Sword” (Boufuu), a blade conjured from Omen (Maki/魔気) energy that withers the forest around it. The escalation suggests Luffy’s resemblance to Joy Boy caused Imu to take the fight to an entirely different level.
5. Chapter 1188: The chapter title and the Void Sword’s name — “Boufuu” (虚無) — derive from the Hebrew phrase tohu wa-bohu (Genesis 1:2), meaning the formless, empty void before God’s creation. Imu using a weapon named after primordial nothingness against the inheritor of Joy Boy’s will carries unmistakable symbolic weight: she seeks to return him to the void he came from.

📌 Key Evidence: Joy Boy’s Den Den Mushi call uses the exact same word — “respond” (応答せよ) — that Vegapunk used when broadcasting to the entire world in Chapter 1108. This strongly implies Joy Boy was attempting a world-wide transmission, and that the Den Den Mushi itself may trace its origins to Joy Boy’s civilization — making Imu’s accidental reception of that call even more cosmically significant.

Our Analysis

What makes Chapter 1188 so quietly devastating is not the spectacle of Luffy being stabbed — it’s Imu’s internal crisis. Here is an entity who has outlived empires, who orchestrated the erasure of entire kingdoms, who has spent 800 years maintaining control over the world. And yet a rubber-boned pirate with no memories of Joy Boy makes her feel something she cannot suppress or explain. That involuntary recognition is Oda’s most elegant argument yet that “inherited will” is not a metaphor in One Piece — it is a literal, almost metaphysical force that transcends time, memory, and even death.

The Den Den Mushi origin theory is particularly compelling because it recontextualizes Vegapunk’s broadcast in Chapter 1108 as a direct echo of Joy Boy’s original transmission. If Joy Boy invented the Den Den Mushi and used it to reach out to the world, then Vegapunk — who dedicated his life to understanding the world’s lost technology — may have unconsciously replicated Joy Boy’s final act. The world’s first connection and the world’s last message before Egghead’s fall would then form a perfect narrative loop. Imu, who received Joy Boy’s very first call, was also indirectly targeted by Vegapunk’s last one. The irony is staggering.

As for the Void Sword: naming Imu’s most powerful weapon after the primordial void of Genesis is not subtle, and it isn’t meant to be. Joy Boy’s will represents creation — the Dawn, the liberation of the world, the fulfillment of an ancient promise. Imu’s weapon represents the negation of all that: the state before creation, before will, before joy. The fight between Luffy and Imu is being framed not just as pirate versus tyrant, but as will versus void, dawn versus erasure. The question of how Luffy survives — likely through Shuri’s awakening of the “Bipolar Eyes” — will tell us a great deal about what kind of force can counter primordial nothingness.

Theory Credibility Rating

This receives a perfect five stars because it is not a speculative leap — Chapter 1188 explicitly shows Imu confused by her own reaction to Luffy, the parallel with Roger’s crewmates is established canon, and the “inherited will” reading is the only interpretation that resolves Imu’s stated confusion without relying on a physical resemblance that the manga itself rules out.

Source: https://onepiece-latestlab.com/newest-story-1188/