The “Iron Giant” robot is one of the unexpected characters who took the center stage in the Egghead arc. It has been hinted several times that it may return to life and fight alongside Luffy in his Gear 5 form, aka Nika form. At last, the ancient robot awakened to save the day and averted the Gorosei’s fury. Therefore, if you are curious about the existence of the Emet the Iron Giant robot and its haki knot, here is everything you need to know about it.
Spoilers Warning:
This article contains spoilers about the Iron Giant Emet. Proceed with caution.
Who Is the Iron Giant In One Piece?

Around 900 years ago, during the Void Century, Emet, also known as the Ancient Iron Giant Robot, was invented by an unknown individual. The energy used by this robot to function is produced by listening to the Drums of Liberation that play when Luffy enters his Gear 5 form. However, there was also an ancient energy source used to power this gigantic robot.
Emet was one of Joy Boy‘s best friends during the Void Century. Thus, some fans claim that Emet could be considered one of the crew members of the Joy Boy Pirates, along with the likes of Zunesha, Fishman Island princess, and Nefertari D. Lili.
After hearing the Drums of Liberation beating as Luffy entered his Gear 5 Nika form on Egghead Island, the robot powered back up and started helping the Straw Hat Pirates fend off the wrath of the Five Elders currently in the One Piece anime.
Fun Fact:
The word Emet translates to “Truth” in Hebrew. In addition, this word must be written on a golem in order to bring it to life, according to Jewish Mythology. It seems like Oda sensei once again drew inspiration from real world folklore for the Iron Giant.
Emet the Robot’s History in One Piece

Emet has been in existence since the Void Century. The Five Elders claimed that this was the same robot that rampaged through Mary Geoise some 200 years ago in the story. The fact that this robot climbed all the way up the Red Line remains an impressive feat to this day. The Iron Giant ran out of energy after the Mary Geoise incident around 200 years ago and entered a dormant state.
While the World Government had ordered its destruction, St. Saturn asked the scientists to study it instead. Ultimately, Dr. Vegapunk acquired the Iron Giant and kept it on Egghead Island. Furthermore, Dr. Vegapunk hid his transmission Den Den Mushi inside the giant robot. That came in handy because to end the transmission of Dr. Vegapunk’s message, they would need to defeat this gigantic robot first.
Even though St. Topman Warcury knocked down Emet and disrupted the broadcast, Emet was able to get back up, all thanks to the Drums of Liberation sound from Luffy and Bonney in Nika form. So, we got to hear the old scientist’s broadcast once again as he talked about the D clan and the fight to reach the One Piece. After unleashing Joy Boy’s haki, the Iron Giant ran out of power and became inactive at the end of the Egghead incident.
How Strong Is the Iron Giant in One Piece?

Oda sensei kept playing with our minds with Emet for a long time. Thus, when it was finally time to see its powers, it blew everyone’s minds. Whenever Luffy tried to deliver a powerful blow to Topman Warcury, he couldn’t and remarked that Topman’s devil form had tough and sturdy skin. Even in his Gear 5 form and using advanced forms of Haki, Luffy wasn’t able to deal much damage against this monster.
However, when Emet punched Topman Warcury, it snapped one of his tusks and made him finally bleed. This moment was a testament to the tremendous strength of the Iron Giant. So, we know that Emet is built different physically, but there is one more surprising power up its sleeve.
Emet Haki Knot

It was further revealed that Joy Boy informed Emet of a scenario that would necessitate the robot’s action in the future. Therefore, the legend somehow released a portion of his Conqueror’s Haki and stored it inside his robot friend, Emet, in the form of a knot. So, when the Five Elders cornered Luffy and his friends, Emet decided it was the right time and unleashed its trump card.
As a result, Joy Boy’s Conqueror’s Haki outburst knocked down every single marine on the futuristic island and sent all the elder stars back to the Holy Land. Even Imu, who was on Mary Geoise, could feel this haki from such a long distance. This was the biggest feat of haki we have ever seen, and it allowed the Straw Hats to escape safely, all thanks to the Iron Giant.
That said, what is your favorite moment of Emet in One Piece? Let us know in the comments below.
We don’t know for certain if Emet possesses haki, but it unleashed the Conqueror’s Haki stored inside him by Joy Boy ages ago in the climax of the Egghead arc.
Emet apologized to Joy Boy as the Iron Giant couldn’t fulfill the ambition of making him a king.
Joy Boy gave his conqueror’s haki to Emet by storing it inside the robot in the form of a haki knot.