One possible character development for Naruto is that he becomes more cautious. Kabuto has been a sly and unpredictable character. Meeting him might make Naruto less likely to trust so easily. On Kabuto's side, he could develop a sense of self - worth outside of being Orochimaru's subordinate. He might start to see himself as an individual with the potential to do good, and his character could transform from a somewhat villainous figure to an anti - hero or even a hero, depending on how the fanfic unfolds.
In this fanfic, Naruto might learn to be more carefree like Killer Bee, which could balance out his often - overly - serious nature. On the other hand, Killer Bee could gain a new respect for Naruto's determination and grow to be more protective of him. He could see Naruto as a symbol of the new generation of ninjas that are worth mentoring.
A 'naruto meets kabuto fanfic' could start with Naruto sensing an unusual chakra signature which turns out to be Kabuto. Naruto would be ready for a fight, but Kabuto might hold up his hands in surrender. They could then have a conversation where Kabuto reveals some secrets about the past, like some hidden experiments of Orochimaru that could still pose a danger. Naruto might then decide to keep Kabuto under watch or try to convince him to use his knowledge for good.
One possible plot development is that Naruto's dad helps him unlock new powers. Maybe he shows Naruto a secret Uzumaki technique.
For Naruto, he would further develop his understanding and compassion. He would see that even the most seemingly evil characters have a backstory and reasons for their actions. This would make him even more determined to save everyone he can. For Tobi, his development would be huge. He could go from a revenge - driven, shadowy figure to someone who realizes the error of his ways and wants to make things right. He might learn about the value of life and friendship from Naruto.
He could develop a more serious and brooding personality. The white hair might be a constant reminder of a difficult event, causing him to be less carefree. For example, if he got the white hair from a near - death experience, he might be more cautious in battles and less likely to rush into things like he used to.
For Naruto, he could develop more patience and understanding. Usually he's quick to act, but being around Hana Inuzuka, he might learn to think things through more. Hana, on the other hand, could become more open - minded. She's from the Inuzuka clan which has its own set of traditions. Interacting with Naruto, who is quite different, could make her more accepting of new ideas. For example, Naruto's belief in never giving up on anyone could influence her to be more inclusive towards others in the village.
Naruto could become more in - touch with his animalistic side, which might initially make him seem more wild or unpredictable. But as he learns to control it, he could gain a new level of confidence and power.
Kakashi could become more distrustful after meeting Tobi. Since Tobi is such a mysterious figure, Kakashi might start to suspect everyone around him more.
Keith could develop a stronger sense of self - confidence. Comparing himself to Sasuke, who is a highly skilled ninja, Keith may strive to improve himself even more. Sasuke could develop a sense of camaraderie that he has long lost. With Keith by his side, he might start to trust others again. In addition, they could both develop a more global perspective, understanding different worlds and ways of life through their interactions.
Itachi might start to question his loyalty to the Akatsuki after meeting Minato. Minato's strong sense of justice and love for his village could make Itachi re - evaluate his own actions.