Some fanfictions show that Naruto can use his Kenbunshoku Haki to predict the future in a limited way. He can't see exact events, but he gets a sense of what might happen if he takes a certain action. This helps him in his strategic planning, especially when facing powerful opponents. For example, if he's about to make a move in battle, his Haki might warn him if it's a bad idea.
In a number of fanfiction scenarios, Naruto's Kenbunshoku Haki is used to enhance his ninjutsu. He can sense the flow of chakra in the air and use that knowledge to better control his jutsu. He might be able to detect weaknesses in an opponent's chakra shield and target those areas specifically, all thanks to his Kenbunshoku Haki.
In fanfiction, Naruto's Kenbunshoku Haki might work in various ways. It could be that he instinctively senses danger, like in the original concept of Kenbunshoku Haki. For example, he may be able to dodge attacks without seeing them clearly. This gives him an edge in battle, making him seem almost prescient.
One aspect that makes it unique is Naruto's already existing strong will. In the original Naruto series, his willpower is a major factor in his growth and success. When combined with Haoshoku Haki in fanfiction, it amplifies this willpower in a different way. Instead of just inspiring his comrades, it can now be used as a weapon against his enemies.
Maybe he can control the metal in the earth to create underground tunnels or barriers. It would be a great way to surprise his enemies or protect his allies. He could also use his power to manipulate the metal in machinery, like disabling enemy weapons or enhancing his own tools.
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.
In this fanfiction, Naruto's development with Haki could be quite interesting. Firstly, Haki could enhance his sensory abilities even more than his regular chakra - based perception. This would allow him to detect threats from afar and better protect his village. His physical attacks could also become more powerful. He might start to train with different characters who are more familiar with Haki, like if there are any characters from other universes introduced. This could lead to him learning new values and cultures, expanding his world view, which in turn would shape his character in a more complex and mature way.
One unique application could be that he uses it to relive his training days and improve his skills even more. He can go back to his time with Jiraiya and learn from his mistakes during training. Another is that he can slow down time during a battle to dodge attacks that are otherwise too fast for him.
Naruto might also use his blood control to enhance his physical abilities. For example, he could increase the oxygen - carrying capacity of his blood to boost his stamina. Or he could control the blood flow to his muscles to increase their strength momentarily. This would make him an even more formidable opponent in combat, and these applications would make for some really interesting scenarios in the fanfic.
Yes, in many Naruto fanfictions, authors often give Naruto the power of Haki. It's a creative way to blend the concepts from One Piece (where Haki exists) with the Naruto universe. This can lead to really interesting storylines, like Naruto using Haki to sense enemies' intentions better during battles or using it to enhance his existing jutsu.
Naruto's use of haki would be a game - changer for his combat skills. Haki has different forms. For example, the Observation Haki could allow Naruto to see the future movements of his opponents to some extent. This would combine really well with his already amazing combat skills like his Rasengan and Shadow Clone jutsu. He could use his clones more effectively to surround and attack his enemies while using haki to predict their counter - attacks.
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.