Maybe for his own gain. Kakuzu might see potential in Naruto and think that by training him, he can use Naruto for some future plan. For instance, if Naruto becomes powerful enough, Kakuzu could use him to take on bigger enemies or get access to certain resources.
In a fanfiction where Naruto is trained by Kakuzu, Naruto's view of the ninja world might change. Kakuzu has a rather cynical view due to his long life and the many betrayals he has faced. This could either make Naruto more understanding of the darker side of the ninja world or it could make him more determined to change it for the better. On the physical side, Naruto might gain more control over his chakra, as Kakuzu is very proficient in chakra management. He could also learn some new combat strategies that are different from what he has learned from Jiraiya or Kakashi, which would expand his arsenal in battles and make him an even more formidable opponent.
Well, it could be that they are new to the world of both Harry Potter and the source of Kakuzu. And without proper knowledge, they might assume that since both involve elements of the supernatural or magic in some way, that there is a connection. However, as we know, Harry Potter has its own rich tapestry of magic, such as the magic taught at Hogwarts, the magic of the wizarding families, and the dark magic associated with Voldemort. And Kakuzu comes from a completely different context with its own set of rules and characteristics. So it's just a case of misinformation or lack of in - depth understanding.
In a Wattpad fanfiction where Naruto is trained by Kakuzu, Naruto might learn some unique and unorthodox ninja techniques. Kakuzu is known for his combat skills and his ability to use multiple elements. So Naruto could gain a more diverse combat style, perhaps incorporating some of Kakuzu's stealth and efficient killing moves. However, this would also be a very different kind of training from what he got in the original series, which might change his character development in unexpected ways.
In fanfiction, their interactions could start off with mistrust. Kakuzu, as an Akatsuki member, would be seen as an enemy by Naruto. But if there's a plot twist, like they have to work together to save a village or something, their views of each other would change. Naruto's optimism could slowly infect Kakuzu, and she might start to open up more, leading to more positive interactions like sharing stories about their pasts.
If raised by Kakuzu, Naruto's view of the ninja world would be different. Kakuzu's focus on self - gain and survival could make Naruto more self - centered initially. But as he grows and interacts with others, his inborn kind - hearted nature would start to emerge. He'd have to reconcile Kakuzu's teachings of looking out for oneself with his own desire to protect and befriend others. He might also develop a more cynical view of the shinobi villages' politics due to Kakuzu's own experiences and views on such matters.
Well, if Naruto had Kakuzu's abilities, he'd be a much more formidable fighter. Kakuzu could use multiple hearts to gain different elemental powers. Naruto could use this to his advantage in battles. For example, in fights against strong opponents like Pain, he could use the extra elemental powers to counter Pain's various abilities more effectively. It would also change his relationships. His friends might be a bit wary of him having such strange and powerful new abilities.
In a Naruto Kakuzu bloodline fanfiction, it might explore how the two characters' bloodlines interact if they were related in some way. For example, perhaps there was a long - lost family connection that was hidden, and this connection unlocks a new form for Naruto that combines his Uzumaki bloodline with Kakuzu's mysterious lineage. This could lead to Naruto having enhanced physical strength and durability similar to Kakuzu's tough body.
The coolest aspect would be his new elemental powers. Kakuzu had different hearts for different elements. Naruto could combine these with his own Rasengan. Imagine a Rasengan infused with multiple elements from Kakuzu's hearts. It would be an extremely powerful and unique attack.
One common theme is the exploration of differences. Since Kakuzu in the original is a rather cold - hearted character focused on money, a female version often has different values that clash and then blend with Naruto's ideals of friendship and loyalty.
One possible plot could be that Kakuzu, with his tough and practical nature, trains Naruto in a very different way from the traditional Konoha style. He might focus more on self - reliance and survival skills. Naruto could learn unique jutsu from Kakuzu related to his earth and water - based techniques.