The plot could involve Naruto being transported to a realm where haki is common. There, he meets a mentor who teaches him haki. Naruto's natural determination and quick - learning ability would help him pick up haki skills fast. He might initially use Observation Haki to sense the movements of his enemies more precisely, giving him an edge in combat. As he progresses, he could use Armament Haki to enhance his taijutsu, like making his punches and kicks more devastating. This new power would shock his friends and foes alike in the Naruto world when he returns.
Well, in such a fanfic, Naruto could start learning haki perhaps from a mysterious traveler who has knowledge of different worlds. He might first struggle with understanding the concept of haki, like differentiating between Observation Haki and Armament Haki. Then, as he trains, he could gradually incorporate haki into his existing jutsu. For example, using Armament Haki to strengthen his Rasengan, making it even more powerful and capable of breaking through tough defenses that normal Rasengan couldn't. This would make him an even more formidable opponent in battles against tough enemies like Madara or Kaguya.
In a 'naruto learns haki fanfic', Naruto could discover haki during one of his solo training sessions in a mysterious forest. He stumbles upon an ancient scroll that details haki. At first, he has no idea what it is, but his curiosity gets the better of him. He starts by trying to awaken his Observation Haki, which allows him to perceive things on a different level. He then realizes how useful it can be in his battles. With Armament Haki, he could add a new dimension to his fighting style. For instance, he could coat his kunai with Armament Haki, making them able to cut through almost anything.
Maybe an ancient sage in Naruto's own world who has long - been in seclusion. This sage has knowledge of different power systems beyond just chakra. He notices Naruto's pure heart and strong will and decides to pass on his knowledge of haki to Naruto, believing that Naruto can use it for the greater good of the ninja world.
In some fanfictions, Naruto might discover haki during a particularly intense battle. Maybe when facing an enemy with an unusual power that his regular jutsu can't handle, he unknowingly taps into his latent haki ability.
One possible plot could be that Naruto discovers the Chidori technique while training in a secret area. Maybe he stumbles upon some old scrolls left by Kakashi. He then has to train hard to master it, facing difficulties like controlling the lightning chakra. As he progresses, he combines it with his own unique Rasengan, creating a new and powerful jutsu.
Well, one possibility is that he becomes much stronger early on and is able to take on tougher opponents. Maybe he could save his friends from more dangerous situations sooner. For example, he might be able to defeat Orochimaru earlier in the story, preventing him from causing more harm to Konoha.
One possible plot could be that Naruto discovers an ancient scroll that has a simplified version of the Rasengan technique. He spends days secretly practicing it in the forest, facing initial failures but gradually getting the hang of it. With his new - found skill, he surprises his friends and even manages to use it in a sparring match against Sasuke, changing the dynamics of their rivalry early on.
In this kind of fanfiction, usually the plot might involve Luffy starting to discover his latent conqueror's haki power. Maybe he first experiences some intense battles where he unknowingly shows signs of it. Then, he might meet an old and wise character who recognizes this power in him and starts to guide him on how to control and use it effectively.
The fanfic could center around a group of characters. One of them is coated in invisible haki and has to protect the others from an unseen threat. The haki could act as a shield as well as a means of camouflage. It could also be a story of self - discovery, as the character learns more about the extent of their haki power and how it can be used not just for combat but also for stealthy exploration.
One possible plot twist could be that Naruto discovers a hidden aspect of the Hiraishin no Jutsu. For example, it might have a connection to an ancient Uzumaki clan ability that no one knew about. This could lead to Naruto being able to use it in ways that Minato, his father, never did.
In a fanfic where Naruto uses haki, it could change his relationships with other characters too. For example, if he shows this new power, some characters might be in awe of him, while others might be jealous. His training to master haki could also lead to new interactions with mentors or allies who are familiar with this power. Also, his use of haki could potentially attract the attention of new enemies who are interested in this unique ability.
I think Conqueror's Haki would suit Naruto. He has that natural leadership and strong will, just like characters in One Piece who possess Conqueror's Haki. It would be a great addition to his existing confident and determined personality.