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.
Well, if Naruto has a defense like Gaara, it would make him much more difficult to defeat. Gaara's defense is based on his sand, which can automatically protect him from attacks. For Naruto, this could mean that he could withstand more powerful jutsu from his opponents without getting seriously injured. This would give him an edge in battles as he could focus more on his offensive moves rather than constantly having to dodge attacks. Also, it might change the way his enemies strategize against him. Instead of trying to directly attack him, they might look for ways to bypass his new defense.
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.
One example could be Naruto developing a new jutsu that creates a chakra - based shield which is unbreakable. Another might be that he inherits a special power that gives him an automatic defense against all attacks. Maybe he forms a pact with a powerful spirit that surrounds him with an impenetrable barrier in the fanfiction.
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.
Well, I think Rock Lee could be a main character in 'Naruto Self Defense Force Fanfiction'. His determination and unique taijutsu skills would make him a valuable asset. Shikamaru, with his intelligence and strategic thinking, would also be a great choice. And Hinata, with her Byakugan and gentle yet strong nature, could be a main character too. She could use her Byakugan to detect hidden threats and her combat skills to defend. They together could form a diverse and interesting group within the self - defense force.
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.
It could be the influence of a powerful enemy or a dark power. Suppose there is an enemy who has the ability to manipulate emotions or a dark power that corrupts Naruto's mind. This could lead him to change his personality and become more like Gaara. For example, if the enemy makes Naruto feel alone and unloved, he may start to develop the same cold and distant behavior that Gaara once had.
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 type could be a chakra - based shield that forms automatically when he's in danger. Another might be a summoned creature that acts as a defense without Naruto having to give a command.