Haki is an extremely special power that dwells within all those who live in the One Piece world. However, very few are able to make use of its true potential. To put it simply, Haki is a person’s willpower or ambition. Through rigorous training, anyone can utilize this power to strengthen themselves.

Haki is mainly divided into two types: Color of Arms Haki, also known as Armament Haki; and Color of Observation Haki, or simply Observation Haki. A rare third type of Haki, called Conqueror’s Haki, also exists in very few characters in One Piece. Each of these main types has subtypes as well — here’s everything fans need to know about these types of power.

Observation Haki

Observation Haki is known to be the most basic form of Haki. It grants heightened senses akin to a sixth sense, and even grants the power of precognition to a certain extent. This power appeared on several occasions in the story, before being finally explained by Silvers Rayleigh before the timeskip.

On Skypiea, Observation Haki is known as Mantra. Observation Haki appears to be the most layered form of Haki, and it has the widest range of applications among the various types.

Sub-Type 1: Presence, Emotion, Intent Sensing

Observation Haki grants a sixth sense to a person, and thus allows them to sense someone’s presence without even actually seeing them. At the same time, it also allows people to sense the emotions of others. For example, Sanji could hear the tears of a woman falling from a mile away on Punk Hazard.

What’s more, with the right mastery, Observation Haki also lets people sense other people’s intentions. When Luffy and Yamato met, for example, Luffy was immediately able to tell that Yamato wouldn’t hurt him because he sensed no malice.

Sub-Type 2: Strength Gauging

Observation Haki can also allow the user to gauge the strength of other people. Using Observation Haki, one can make an estimate of the difference in strength between themselves and a potential opponent.

Fans saw an example of this on Zou, where Luffy was able to tell that Inuarashi was very powerful without even fighting him or seeing him in combat. Evidently, Luffy used his Observation Haki to gauge Inuarashi’s strength and was surprised to hear that Jack was able to defeat him.

Sub-Type 3: Future Sight

Quite possibly the most advanced form of Observation Haki is the Future Sight. A person myst train their Haki to the extreme in order to attain this power. Eventually, it allows them to see some seconds ahead into the future itself, making it an incredibly powerful ability.

Charlotte Katakuri of the Big Mom Pirates was the first person seen to use this ability, and used it to thoroughly study Luffy in their fight. Consequently, Luffy managed to learn how to see the future as well.

Best Observation Haki Users

Being a very layered power, Observation Haki has different users who excel at different subtypes of this power. When it comes to sensing emotions, Sanji of the Straw Hat Pirates is one of the very best users of the ability, as seen on various occasions across Punk Hazard, Dressrosa, Whole Cake Island, and even Wano.

Along with him, the Navy Admiral Fujitora is also considered to be among the very best users of this type of Haki. When it comes to Future Sight, Charlotte Katakuri is quite easily the best user of the power, having had complete mastery over it for years. In fact, before his fight against Luffy, Katakuri hadn’t been hit for years. Luffy, the Captain of the Straw Hat Pirates, excels at both sensing emotions and seeing the future at the same time.

Armament Haki

Armament Haki is arguably the most useful form of Haki in One Piece, as it allows the user to manifest their spirit invisibly. They can then use it in both offensive and defensive ways by coating their bodies with it.

The biggest advantage of Armament Haki is that it lets the user bypass whatever protection that a Devil Fruit offers, such as the rubbery nature of Luffy’s Gomu Gomu no Mi or the flame body offered by the Mera Mera no Mi. Armament Haki is often shown to harden, although whether this strengthens the Haki is up for debate.

Sub-Type 1: Ryou Emission

Ryou is an advanced usage of Armament Haki which is commonly used by the people of Wano. Although Ryou emission simply means Haki to them, its usage is very different. It allows the user to let Haki flow through their body calmly and emit it from one point, allowing them to break through even the toughest of defenses.

This form of Haki is, thus, better when compared to regular Armament Haki.

Sub-Type 2: Internal Destruction

Internal Destruction is a very advanced form of Armament Haki that is available to only a handful of people in the One Piece world. This form of Haki works the same as Ryou. The only difference is that it destroys the target from within, dealing internal damage without having to pierce the exterior.

As such, this form of Haki is much more powerful. It’s strong enough to destroy even the explosive collars of the Celestial Dragons.

Best Armament Haki Users

Armament Haki isn’t nearly as layered as Observation Haki and, usually, grows is considered to be strong in all the elites. However, there are some characters whose Haki is known to be extremely powerful. According to Trafalgar Law, Yonko Kaido and Big Mom have tremendous Haki and he cannot move them with his Ope Ope no Mi powers.

At the same time, both Kaido and Big Mom are users of Ryuo, an advanced form of Haki. Rayleigh is an exceptionally good user of Internal Destruction Haki, as is Luffy, who managed to pick this technique up in Wano Country. Kozuki Oden was one of the very best users of this type of Haki and his Ryuo was feared even by the likes of Yonko Kaido. Some other exceptional users of this power are Gol D. Roger, Whitebeard, Garp, and even the Admirals of the Navy.

Conqueror’s Haki

Also known as The Supreme King Haki, Conqueror’s Haki is a special power that only a handful of people are born with. It is believed that one in a million people possess this power, making it extremely fearsome.

On a basic level, Conqueror’s Haki allows the user to show off their willpower by imposing it on others. Those with weaker will pass out immediately without even being touched. Although not as layered as Observation Haki, Conqueror’s Haki has many applications.

Sub-Type 1: Domination And Pressure

In addition to knocking people out as mentioned above, Conqueror’s Haki also lets the person dominate the spirit of others and tame them, mostly seen with animals. With it, Luffy was able to tame Uucy in Dressrosa, and even Surume on the way to Fishman Island.

Another application of Conqueror’s Haki is the ability to generate pressure, which can be seen when two Conqueror’s Haki users clash. The pressure generated usually damages the environment around them. Shanks was able to damage Whitebeard’s ship without even touching it. What’s more, when two elite users of Conqueror’s Haki clash, the pressure generated results in the heavens splitting apart.

Sub-Type 2: Infusion

Conqueror’s Haki can also be infused into the attacks of the user, making them incredibly powerful. This was explained in the Wano Country arc when Luffy fought Kaido. According to Kaido, only the very strongest people can manage to do this and even fewer can do it with skill.

Kaido infuses Conqueror’s Haki in almost all his techniques, such as Thunder Bagua or Ragnaraku. After watching him use this power, Luffy also managed to learn its usage, however, his version was much cruder. In addition to those two, Yamato, Roger, Whitebeard, and Big Mom have been seen using Conqueror’s Haki infusion.

Best Conqueror’s Haki Users

Conqueror’s Haki is the rarest of all types of Haki in One Piece and only a few people possess it in the New World, implying that there are even fewer people who have a full mastery of this power. So far, Kaido appears to be a great user of advanced Conqueror’s Haki, as evident from his usage of techniques such as Thunder Bagua and Ragnaraku. Big Mom, another Yonko, is just as good a user of Conqueror’s Haki, however, she doesn’t seem to use it as often.

Other notable users of Conqueror’s Haki include Monkey D. Luffy, Yamato, and Roronoa Zoro. While Shanks hasn’t shown his true power to the fans just yet, he is presumed to be an extremely powerful user of Conqueror’s Haki - perhaps the strongest of them all. In the past, Gol D. Roger and Whitebeard also displayed tremendous skill with the usage of Conqueror’s Haki.

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