Roronoa Zoro is undoubtedly one of the most famous characters in One Piece. Like Luffy, Zoro wants to be the best in his class, that is, he wants to become the best swordsman in the world, surpassing his idol and rival, Dracule Mihawk, who is considered the best swordsman in the world. But the swordsmen in One Piece aren't the only interesting aspect—the swords are too. In Wano Country, among all Zoro's blades, we also have Enma, a very special sword that Zoro used in his fight against King. But during the fight, Zoro noticed that Enma was draining his Haki against his will, and in this article, we'll explain why this happens.

Enma drained Zoro's Haki because he was unable to control the sword. Enma, like many swords in history, has its own "will." Enma is a very powerful sword with a unique ability: due to its power, it freely drains its user's Armament Haki against their will, which is why only the most powerful and skilled swordsmen can use it. Enma did the same thing to Zoro for a while until the swordsman was able to control it.

The rest of this article will focus exclusively on Enma, Zoro's third sword in his current collection, and its specific abilities. We'll tell you about Enma, the sword's history, and how it influenced Zoro's battles in Wano Country. You'll also discover what Enma can do and why this sword, in particular, is so special and important in the story of One Piece.

Enma has unique abilities but is very powerful

Enma is known as one of the finest blades in the world and the creator of the renowned swordsmith Shimotsuki Kozaburo. He is one of the 21 O Wazamono, and Kozuki Hiyori believes he can rival the legendary Shuusui. Enma, like Ame no Habakiri, Tenguyama Hitetsu said he was capable of "cutting into the depths of the underworld" (with the ability to "cut the sky itself").

When Enma was perfected, it possessed a powerful advantage. In Oden's hands, Enma and Ame no Habakiri became the only known weapons to ever slice Kaido, leaving him with a significant scar. When Oden was 18, he used Enma and Ame no Habakiri to cleanly slice through the gigantic mountain deity and harden him with Armament Haki. Oden could also fight Whitebeard's Murakumogiri, the Saijo Wazamono-grade naginata, using both swords.

Enma is specific for its unique ability. Namely, the sword is so powerful that it can voluntarily absorb and take enormous amounts of "Ryuō" (which is the name used for Armament Haki in Wano Country) from its user, cutting away much more force than intended; this is done without the wielder's will. Due to his extreme clumsiness, Oden was the only person to tame Enma before it was given to Zoro. While attempting to chop down a single tree after Zoro first tested the sword, he unintentionally cut off a substantial portion of the cliff, causing Enma to emaciate his entire arm in addition to forcibly hardening it.

Hitetsu continued by observing that a typical swordsman attempting to use Enma would be completely drained of all their Haki, turning them into a dry husk. However, as Zoro demonstrates, with enough Haki mastery, one can force the Haki drawn by Enma to flow back from the blade into the user's body. Hitetsu states that Enma could be advanced to the next level if Zoro succeeds in making it a permanent Darkblade.

Only two people have ever managed to tame Enma

The exact reason why Enma is able to draw out so much Armament Haki has never been revealed, but it likely has something to do with how the blade was forged and the general nature of swords in One Piece. While they are weapons, swords are also entities with their own "personalities," which is why not everyone can use any sword in the same way and why some characters can wield one sword better than another, though their sword skills are the most important.

This is also why those who have used a single sword for a long time are extremely effective, because they have learned to know their blades, as well as the nature of their blades.

As for Enma, only two people have been able to master him. Naturally, the first was Kozuki Oden, known as one of the best swordsmen in the series. Oden had astonishing mastery of his Armament Haki and was thus able to control Enma's will. His prowess was such that he was able to freely use and control Enma, even in his duel against Kaido, being able to use Enma to injure Kaido, thus making Enma one of the two blades capable of harming the powerful pirate captain. This proved that, in the right hands, Enma was a truly masterful weapon.

When Zoro received Enma, he had trouble controlling it. This is why he cut off part of a cliff and hardened almost his entire arm, because Enma simply took too much of his Haki away; this was also evident during his fight with King, as Enma continued to draw out so much Haki that Zoro would scold him and ask him to stop. Zoro was a skilled swordsman, but it took him a while to gain control of this powerful blade. This tells us two things.

First of all, Enma is really powerful, as in Wano Country, Zoro is one of the most skilled and experienced swordsmen in the series, but he initially struggled to control the sword. Secondly, Zoro has indeed grown a lot because, despite all the problems, he was able to get his hands on Enma and put it under his control, using it to defeat King and later to fight Kaido, who remembered the blade once he sensed its presence.