Roger used advanced forms of conqueror's haki as he imbued his sword with conqueror's haki and clashed with Whitebeard. He also used advanced armament haki for more powerful sword attacks. Additionally, Roger possessed the observation haki, thus, making him the strongest haki user of all time in One Piece.
Although Conqueror's Haki is rare in One Piece, many users exist in the New World and only a handful have total mastery over it. Updated on February 21, 2023, by Rei Penber: Conqueror's Haki is one of the greatest weapons in the One Piece world, if not the greatest. It is a power that only a few are born with.
One Piece's weakest Conqueror's Haki user is undoubtedly Eustass Kid. He's shown no signs of training or skill with the technique, as well as showing no signs of Advanced Conqueror's Haki. While it's likely he eventually becomes more skillful with it, Kid currently ranks as the weakest user of the form in the series.
Monkey D. Luffy has mastered all three types of haki, including Kenbunshoku Haki (Observation Haki), Busoshoku Haki (Armament Haki), and Haoshoku Haki (Conqueror's Haki). He can even use several subforms of the hakis, which makes him one of the most powerful haki users in the One Piece world.
5 Armament Haki Subtype 4: Internal Destruction
The rarest subtype of Armament Haki, known as Internal Destruction, has only been demonstrated by two characters — Monkey D. Luffy and his mentor, Silvers Rayleigh.
As the story progressed, Luffy grew more experienced with it, and with this harnessing of advanced Conqueror's Haki and his awakened Devil Fruit, it was enough to surpass Kaido and put him as one of the strongest pirates in One Piece.
In the anime, the user of Haoshoku Haki has a dark purple aura around him.
Roger. Conqueror's Haki, also known as the Haki of the Supreme King, is the rarest form of Haki that only a few people in the world of One Piece are born with. Unlike the other two Haki types, Conqueror's Haki can't be learned through training and is only possessed by those who are born with the spirit of a king.
Whether Shanks can defeat Kaido or not is unknown, but he is certainly on par with Kaido, if not stronger. Interestingly, the two have already fought once in the New World, and Shanks emerged unscathed at Marineford after the fight.
The Gura Gura no Mi is considered the strongest Paramecia devil fruit of all for its absolute destructive powers. Whitebeard earned the title of the “Strongest man in the world” with this devil fruit.
In the anime, the user of Haoshoku Haki has a dark purple aura around him. This can be seen only in Episode 723.
White Haki spirit color is the rarest color and cannot be obtained with robux.
Appearance. Zoro is a tall, muscular young man with lightly tanned skin and black eyes. He always carries his three swords along with him, bundled up with a green haramaki over his right hip, allowing him to easily draw them with his left hand.
The Haki Haki no Mi (覇気覇気) is a Paramecia-type Devil Fruit in which the user is able to see all three types of Haki, as symbolized by a different color.
Weakest Observation Haki users are Aisa and Otohime. Both were born with the ability to use Colour of Observation, but since they are not fighters, they don't have any capabilities in combat.
Finally, in his fight against Kaido, Luffy finally understood how to use a higher degree of Conqueror's Haki by coating himself in it. With this power, he was able to coat his body and attack without even touching Kaido.
While Haki can bypass the devil fruit's defence, it doesn't negate the devil fruit, like Sea-Prism Stone does. Instead it "forces the devil fruit user's body into solidarity".
Nico Robin is the archaeologist of the Straw Hat Pirates and one of the crew's strongest fighters. While Robin should've been an Observation or Armament Haki user, given that she spent quite a lot of time around those who wield it during the timeskip, she doesn't equip this skill.
Dragon is almost certainly going to be a user of Conqueror's Haki as well just like his son. In Marineford, Luffy's Conqueror's Haki was attributed to Monkey D. Dragon, meaning he is already implied to be its user despite not having used it so far. In the future, fans will certainly see him make use of this ability.