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 'naruto haki fanfic', Haki can change the Naruto universe by adding a new layer of power. For example, it can make battles more complex as characters now have to consider both chakra and Haki. It might also change the way characters interact with each other, as those with Haki could sense things differently.
Percy often uses Observation Haki to anticipate the attacks of his enemies. He can sense their movements and intentions, which gives him an edge in combat, especially against fast - moving or sneaky foes like some of the monsters in the Percy Jackson world.
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.
One benefit is smoother skin. As seen in many full body wax stories, people love how their skin feels so soft and sleek after the wax. Another is that it can make you look more toned. For example, in the story of the bodybuilder, it enhanced the appearance of his muscles. Also, it can give a boost of confidence, like the girl who went on vacation. She felt more confident showing off her body on the beach.
Haki can completely shift the power dynamics. If a character like Ron suddenly discovers Haki, he could become a much more formidable opponent. He might be able to use it to intimidate Death Eaters or other dark wizards, adding an edge to his character that wasn't there before.
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.
An OC's Haki can be developed through intense training. Just like how Luffy and the others train in the One Piece world. They could face difficult opponents and learn from each battle, gradually strengthening their Haki. For example, if they constantly fight against Logia - type devil fruit users, their Armament Haki would improve to counter their intangible forms.
Well, a full body cast story might involve an athlete who had a horrible fall during a competition. Let's say a skier crashed really hard. They were rushed to the hospital and the doctors decided that a full body cast was necessary to keep all their bones in place while they healed. It's a story of pain, recovery, and the challenges of being immobilized in a full body cast.
A full body inflation story can be a unique form of storytelling. It might involve themes such as transformation. For example, in some fantasy stories, a magic spell gone wrong could lead to a person's body inflating uncontrollably. It can also be used as a metaphor for a character growing in some way, not just physically but perhaps in self - importance or ego, where the inflation of the body is a physical manifestation of that internal change.