All members of the Monster Trio possess Haki, with Luffy and Zoro possessing all three types and achieving advanced applications.
Nami is also a competent fighter, although among the weakest in the crew. She mainly makes use of her wits in combat to get the better of her enemies. Surprisingly, One Piece 1058 showcased her using Conqueror's Haki in what appeared to be a gag scene.
Sanji is an extremely skilled Haki user. During the two years he spent at Maiden Island, he trained his usage of both Armament and Observation Haki. Unlike Zoro and Luffy, Sanji wasn't taught this skill by anyone.
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).
Luffy, who is undoubtedly the strongest Straw Hat capable of using Haki. One major argument for such a conclusion is his being able to use Conqueror's Haki, which he specializes in, as well as Observation and Armament Haki.
Zoro is a very powerful fighter and he possesses all three types of Haki. Zoro was able to use Conqueror's Haki unknowingly against Kaido. Biggest Feat: With his newfound power, Zoro managed to defeat the right-hand man of Kaido, however, his biggest feat is scarring Kaido.
4/12 Armament Haki Subtype 4: Advanced Ryuuou
So far, only two characters have shown the ability to use it, Rayleigh being one, and Monkey D. Luffy being the other. Although Rayleigh seemed like an expert at using it, Luffy has only managed to use it subconsciously.
Haoshoku Haki is a rare form of Haki that allows the user to exert their own willpower over others. This type of Haki cannot be attained through training and only one in several million people are born with this ability.
Kenbunshoku Haki, one of the three Haki types in One Piece, grants the most powerful pirates unfathomable abilities. From sensing people's morality and emotions to being able to predict movements in battle, this form of Haki allows users to tap into a sixth sense that provides impressive precognitive abilities.
Haki. How Usopp sees things using Kenbunshoku Haki. Usopp has awakened his Kenbunshoku Haki during the latter half of the Dressrosa revolt, as he was able to see auras of Luffy, Law, and Sugar, who were in the royal palace, from the old King's Plateau near the Corrida Colosseum.
The first character to appear in One Piece CAPABLE of Armament Haki Was Red-Haired Shanks and probably most of his crew as well, during Luffy's flashback.
Though she has not yet displayed the ability to use Haki, Robin is fully aware of the power as she commented on Luffy knocking out half of Hody's men. She also has great knowledge about Haki, such as explaining the principles of Busoshoku Haki to Franky when Luffy fought Caesar Clown.
There are three major types of Haki: Observational, Armament, and Conqueror's.
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. Haki (覇気) meaning “Ambition”, in both Viz Manga, and the FUNimation dub called the Color-Color Fruit and it was eaten by Gozu.
The 3 legendary colors (Winter Sky, Pure Red, and Snow White) are required to summon the raid boss Rip indra (Raid Boss).
Pobably because he can't sleep or else he would die. This allows him to eat 2 fruits.
Luffy made his debut as a young boy who acquires the properties of rubber after accidentally eating one of the devil fruits the Gum Gum Fruit, originally known as the Human-Human Fruit, Model: Nika.
Could 2 people have the same devil fruit? This is probably a stupid question, but since it only requires a single bite of a devil fruit for the powers to be transmitted, could 2 people take 1 bite of the same fruit, and both get the powers? Nope, only the first one can have its ability.
Armament Haki is colored black so that the audience can visually identify when someone is using it, as opposed to having to guess or be outright told in every fight.
Sword attacks with haki can hurt Buggy but can't bleed him as haki can't nullify DF power in which he can't be bleed.