Potential character development for Naruto could be that he becomes more adaptable. Serving Orochimaru would put him in situations he's not used to, forcing him to think on his feet. He may also develop a darker side, as Orochimaru's influence seeps in, but at the same time, he could become more determined to uphold his own values. As for Orochimaru, he might start to respect Naruto's tenacity and might even consider changing his ways a bit, or at least re - evaluating his plans in light of Naruto's presence.
Naruto could develop a darker side to his personality. Since Orochimaru is known for his dark jutsu and unethical practices, Naruto might be influenced. But at the same time, his core values of protecting his friends and the village could be strengthened as he realizes he needs to be strong enough to resist Orochimaru's negative influence. Orochimaru might become more interested in Naruto's potential for good rather than just using him for his own evil plans.
He may develop a deeper understanding of the balance between power and control. With the Wabisuke in his possession, he has to learn how to use its power without losing himself. This could lead to him growing in wisdom and self - restraint. He might also become more isolated as he tries to master the weapon on his own at first, but then later realize the importance of his friends' support and grow closer to them in a new way.
For Naruto, he might gain new combat skills influenced by Matatabi. His fighting style could become more fluid and unpredictable, like Matatabi's nature. Matatabi could start to show more compassion. Maybe through Naruto's positive influence, it begins to care more about the humans and the ninja world in general. This would be a big change for a tailed beast.
For Naruto, he would have to grapple with the fact that he is fighting his former friend. This could make him more solemn and determined. He might develop a darker side as he realizes the seriousness of stopping Sasuke. For Sasuke, he could start as overconfident in his power but as Naruto keeps pushing him back, he could become more desperate and start to question his own motives.
A character like Sasuke could be further developed in Orochimaru's lab fanfiction. He might struggle more with the dark knowledge he gains there and eventually find a way to use it for the greater good. Another character could be a new, made - up test subject who starts out as a scared victim but then becomes a strong fighter after enduring the experiments. And Kabuto, who is already associated with the lab, could have a change of heart and try to atone for his actions in the lab.
Naruto would experience a huge shift in his identity. He'd go from being the son of Minato (in the original story) to being Minato's father. This would likely make him more responsible and mature. He'd have to think about protecting Minato and guiding him, which is different from his usual role of being the underdog striving for recognition.
Naruto might develop a new sense of identity. In Kiri, he's not just the Konoha hero. He has to re - establish himself, which could lead to him growing in maturity and self - awareness. He may also become more stealthy as Kiri often values secrecy in its ninja operations compared to Konoha's more open - minded approach in some aspects.
A significant development could be in their relationship. As teammates, they would spend a lot of time together. This could lead to Naruto realizing Hinata's feelings for him in a more profound way. And Hinata would see Naruto in a different light, not just as the boy she has a crush on, but as a reliable teammate. This could lay the foundation for a deeper, more equal relationship between them.
For Naruto, he may gain a new perspective on power. Instead of just seeing the Kyuubi as a source of brute strength, he could start to understand the deeper, more complex nature of the tailed beast. This could lead to a more mature Naruto, one who is not just about fighting but also about protecting through a more nuanced use of power. The male Kyuubi could experience a change in his view of humans. He might see that not all humans are out to control or harm him, especially with Naruto as his'mate'. He could become more empathetic towards the human world and be more willing to cooperate with Naruto's goals.
Sakura could develop a more reckless side. Usually, she's quite level - headed, but in this fanfiction, she might start making hasty decisions that put herself and others at risk. This would be a big change from her normal cautious self.