He could potentially be a demon. Demons in the Naruto universe often have unique powers and appearances, and Naruto's connection to the Nine - Tails could be a starting point for such a transformation in fanfiction.
Maybe he could be an alien - like being. This would completely change the dynamics of the Naruto story. He could have strange powers not related to chakra, and his appearance might be very different from the normal Naruto. His relationships with other characters would also have to be re - evaluated in this new context.
Maybe she could be a half - elf. Elves in the Harry Potter universe are known for their grace, archery skills, and long lives. As a half - elf, Fem Harry Potter would have some of these traits and a different perspective from a human. She might have a closer connection to nature and magic in a more primal way.
He could be a demon. In some fanfictions, Naruto might be reimagined as a powerful demon with unique abilities that are different from his normal human ninja skills.
Rock Lee could be an interesting human summon. His extreme dedication to training and unique fighting style would make him a valuable asset in battles. He could be summoned to help Naruto when facing opponents with strong physical abilities.
The Akatsuki could be the main antagonists. They might see the immortal human as a valuable asset or a threat to their plans. For example, they could want to use the immortal human's unique abilities for their own ends, like using their immortality to perform dangerous and unethical experiments. Or they could view the immortal human as a threat to their goal of world domination, fearing that the immortal human could rally the ninja world against them.
Well, in fanfiction, Kurama's human form could be a really imposing figure. He might have long red hair, just like his fox form's fur color, and bright, piercing eyes. Maybe he'd be tall and muscular, with a sort of wild, untamed look about him, still carrying that powerful presence that he has as a tailed beast.
Perhaps his strength is superhuman. He could lift extremely heavy objects like boulders effortlessly, which would give him an edge in battles. For example, he could use these boulders as weapons against his foes.
I'm not entirely sure if there is a specific, well - known fanfiction where Naruto is a human puppet. However, given the vastness of the fanfiction community, it's very possible. Fanfictions can range from the most outlandish to the more subtle in their changes to the source material. This idea of Naruto as a human puppet could potentially be used to tell a very dark or a very different kind of story about him.
Well, in a 'naruto last human fanfiction', it could potentially explore Naruto's character in a very different light. He might be on a journey to find out why he is the last human. It could involve him traveling through a world that has been destroyed, perhaps by some great war or a cataclysmic event, and along the way he discovers secrets about the past and tries to find a way to bring back humanity.
Sasuke could be an interesting main character. He has always been on a path of seeking power and revenge. In a fanfiction about human puppets, he might see the potential in using them as a means to achieve his goals, or he could be the one to oppose their creation if he believes it goes against his sense of morality.
The plot could develop with Naruto facing discrimination from some in the ninja world who fear or distrust demi - humans. He would then have to prove himself not only as a capable ninja but also as a 'good' demi - human.