When it comes to Roronoa Zoro, fans know there are many mysteries surrounding him, but the biggest one is his left eye. As fans have noticed, Zoro returned after the timeskip with only one eye open, and surprisingly, no one has really questioned this.
Interestingly, none of the Straw Hat crew has ever mentioned it, and Oda has never officially addressed it either. However, this silence has a significant reason behind it, and Oda has indirectly hinted at the truth about that eye in his manga.
Zoro’s left eye remains a major mystery
One Piece fans know that whenever Oda changes a character’s design, especially by removing an eye, it’s never a random choice. There’s almost always a deeper, meaningful reason behind it. While some believe Zoro simply keeps his eye closed because Oda wanted a fresh look, the truth is far more important: Oda closed Zoro’s eye for a reason, and this secret will definitely be revealed in the final chapters of the series.
As fans know, Zoro lost use of his left eye on Kuraigana Island, where he trained under Dracule Mihawk, the world’s greatest swordsman. Something significant must have happened during that battle, either Mihawk took Zoro’s eye or Zoro closed it himself to seal away some power.
If Zoro’s left eye wasn’t important, Oda would have revealed its truth by now. In fact, from the very beginning of One Piece, Oda told his mentor Watsuki that Zoro would close one eye in the future.
Even more notably, in 2021 when Watsuki asked Oda about the mystery behind this eye, Oda flatly refused to answer, confirming there is a major, secret reason behind it.
Zoro’s left eye holds demonic power
Zoro’s demonic strength
Zoro’s left eye is clearly connected to the demon inside him. This is no surprise to any fan. Throughout his journey, Zoro has often been called a demon.
At Enies Lobby, Zoro truly exuded a demonic aura. Facing Kaku, he was labeled the “bloodthirsty demon.” He even summoned a six-armed demon god in battle, now known as Asura. Oda officially refers to Asura as a demon god.
Moreover, whenever the demon inside Zoro is unleashed, his left eye glows. It’s clear Oda is deliberately linking these two elements. What can be confidently assumed is that Zoro’s left eye is the source and seal of his demonic power.
Zoro’s eye will help him defeat Mihawk
When Zoro fights Mihawk, the closed left eye will play a crucial role. The demon inside Zoro will finally awaken, and once he masters this power, he will be stronger than ever. This eye could make all the difference in his battle against Mihawk, and fans are certain Zoro will unlock it when they fight for the title of the world’s greatest swordsman.