Maybe Sasuke. He is known for his powerful Sharingan and in the fanfiction, his Sharingan could have evolved to give him an ultimate defense. He could use it to see attacks coming from all directions and then use his chakra to create a shield that is both strong and flexible, adapting to different types of attacks. For example, if it's a fire - based ninjutsu, his shield could absorb the heat and turn it into his own energy.
Well, it could be a unique kekkei genkai that has been given an ultimate defensive quality in the fanfiction. For example, a power that allows the user to transform into an indestructible form, similar to how Gaara can use his sand as a shield but much more powerful. This form could be able to deflect all kinds of attacks, whether they are physical, ninjutsu - based, or genjutsu - based.
I'm not sure specifically as there could be many different versions of a Naruto fanfic with that title. It might involve Naruto developing some ultimate form of defense, perhaps a new jutsu or a special power-up that makes him invincible against certain attacks.
Most likely Naruto would be one of the main characters since it's a Naruto fanfic. He is usually the central figure in any Naruto - related story.
Yes, in some Naruto fanfictions, he can have an automatic defense. Writers often come up with creative ideas to enhance his abilities, and an automatic defense can be one such concept.
It could be the result of some kind of training or a new jutsu he developed. Maybe he learned from Gaara's unique sand - based defense and found a way to create something similar using his own chakra. For instance, he might have discovered a way to manipulate the natural elements around him in a similar fashion to how Gaara controls his sand.
Yes, he can be. Fanfiction is a realm of boundless creativity. If an author wants to reimagine Naruto as an ultimate demon, they can. Maybe they rewrite his backstory to include some dark and demonic elements. For example, his connection to the Nine - Tails could be made more sinister, and his powers could be redefined to be more demonic in nature, like having the ability to spread chaos and destruction.
Naruto could achieve an absolute defense by combining different ninja techniques. He might merge his Rasengan with a sealing jutsu to create a spherical defense that is both offensive and defensive. The Rasengan's spinning chakra could be harnessed in a way that it not only attacks but also forms a shell around him that nothing can penetrate. Also, his experiences in different battles might lead him to innovate a new jutsu specifically for defense. For instance, after facing a particularly difficult opponent, he figures out a way to reverse the flow of his chakra to create a repelling force that acts as an absolute defense.
One thing that might make Naruto an ultimate demon in fanfiction is a corrupted power source. Maybe he gets exposed to some dark chakra that twists his own chakra, including that of the Nine - Tails. His personality could also be warped, making him more aggressive and less empathetic. Additionally, his physical appearance might change to be more demonic, like growing horns or having red eyes, which are all common tropes in making a character seem like an ultimate demon.
Yes, there are likely many Naruto fanfictions where a character has the ultimate Sharingan. You can check popular fanfiction websites like FanFiction.net or Archive of Our Own. Just search for relevant keywords like 'Naruto', 'ultimate Sharingan' to find them.
I'm not sure about the specific plot of this fanfiction as there could be many different interpretations. It might involve Naruto characters in a world where vampires exist, perhaps with Naruto having some new powers related to vampirism or facing off against vampire enemies.