When we hear Imu’s voice, it’s noticeably distorted, but there’s a clear feminine undertone. Keep that detail in mind as we dive deeper into this theory.

Here’s what we know:

• The 20 Founding Leaders: Twenty leaders, including Queen Lilly and a figure named Nerona, came together to form what we now know as the World Government. However, Lilly mysteriously never returned after the war, which means the 20 were together at some point.
• Lilly’s Mistake: We know that Lilly spread the Poneglyphs, a massive mistake that allowed the enemy to preserve vital information for the future. Imu, uncertain whether this was an accident or betrayal, appears to harbor unresolved feelings about her actions.
• The Op-Op Fruit: One of the most crucial details in this theory is the power of the Op-Op Fruit, which is known for its ability to swap personalities and even grant immortality.

Now, here’s where the theory kicks in:

After the war, when Queen Lilly made her mistake, the other kings no longer trusted her. She’d committed an error so huge that it endangered everything. Enter Nerona, a key figure who could have had personal feelings for Lilly, possibly even love. After Lilly’s blunder, he likely saw an opportunity to solve two problems at once.

Here’s the twist: Using the Op-Op Fruit, the 20 kings could have forced two critical changes. The first Op-Op user made Lilly immortal, ensuring she couldn’t betray them or anyone again. Then, a second Op-Op user could have combined the personalities of the remaining 19 kings into one body, Lilly’s body, creating a single entity: Imu. This would explain why Imu appears to have a feminine voice—because it’s still Lilly’s body, but the consciousness is shared by 20 people.

This theory would also explain:

• Imu’s Voice Distortion: If 20 different personalities are speaking through one body, it would cause the kind of strange, layered voice we hear.
• Why Imu Stares at Lilly’s Picture: If Nerona was in love with Lilly, this act reflects both nostalgia and a sense of betrayal. Imu’s obsession with Lilly’s image could symbolize how Nerona—or the combined consciousness—still feels conflicted about what happened.
• The Missing History of the 20 Kings: We never hear much about the original 20 kings because they didn’t truly “die.” Instead, they merged into Imu, leaving behind only their original physical forms during the Void Century.

Finally, Imu’s transformation into a more demonic form could be the result of this forced fusion of 20 personalities, creating a monstrous, unified being.