Since its first reveal, Imu’s flower garden at Mary Geoise has instantly become a major focus for fans. Not only because its peaceful atmosphere contrasts sharply with the supreme power Imu holds, but also due to the strange presence of butterflies constantly fluttering around this entity.
Many theories suggest these butterflies are not just a refined hobby of Imu, but symbols of something far more significant. They could represent spare lives or even the souls of those who have made contracts with him. Especially with the shocking events in One Piece chapter 1178, this theory has gained more credibility than ever.
1. The suspicious disappearance of butterflies in chapter 1178

After Imu was defeated by the alliance of Luffy and Loki in chapter 1178, eagle-eyed fans noticed a subtle but meaningful detail. The number of butterflies in the garden seemed to have decreased, or at least some had vanished.
From a visual perspective, this might simply be the effect of butterfly dust. However, with a master storyteller like Oda, such details are rarely accidental. If the butterflies truly disappeared literally, it suggests their number is directly linked to Imu’s life force. Could they be a specific symbol of his power?
2. The “spare lives” theory of Imu

The most popular theory right now is that each butterfly represents one of Imu’s “lives.” This would explain his near-immortality over centuries. Imu can be defeated or even “technically dead,” but he immediately revives as long as butterflies remain in the garden.
The fact that one butterfly disappeared after Imu was struck by Luffy and Loki could indicate he is not truly immortal. He has limits, and those limits are being worn down by the power of the new era. If this theory holds, the only way to completely destroy Imu is to wipe out all the butterflies.
3. Chains of mysterious contracts?

Another equally intriguing theory is that the butterflies do not represent Imu’s lives but the souls of those who have made contracts with him. We already know Imu has the ability to manipulate or control individuals through mysterious agreements. If each butterfly symbolizes a chained soul, then the disappearance of a butterfly means the contract has been broken.
This detail becomes especially interesting when linked to the character Gunko. If Gunko’s body was previously controlled by Imu and the butterfly representing her vanished, it means Imu lost control over this “sacrifice,” particularly after Gunko was frozen by Loki’s attack.