When Naruto wields the dark soul in the fanfic, his character development takes a sharp turn. He starts to view the world through a darker lens. His once unwavering loyalty to his friends and village may waver. He might become more secretive and less likely to trust others. His sense of humor could also disappear as the dark soul's influence seeps in. For example, he may no longer find joy in simple things like eating ramen with his friends. Instead, he'd be more focused on his newfound power and how to use it to his advantage, even if it means going against his former principles.
If Naruto wields the dark soul in the fanfic, it could lead to a lot of chaos. His friends might not recognize him anymore. His power would likely increase exponentially, but at the cost of his relationships. He might even be seen as a threat by his own village. The dark soul could also bring out hidden desires and a more ruthless side of Naruto that has been suppressed all this time.
His character development could become more complex. He may start to question his own identity and purpose. Since chaos is an unpredictable force, he has to constantly adapt and learn how to use it without causing too much harm.
Naruto's character would become more complex. His initial naivete about the world's darker aspects would quickly disappear. He'd become more cynical as he witnesses the actions of the Dark Brotherhood. His relationships with his old friends in Konoha would also be strained as they might not understand his new allegiance.
Naruto's character could become more empathetic. Hinata's kindness and understanding might help Naruto see things from different perspectives. For example, he might start to consider the feelings of his opponents more often during battles.
His confidence would soar. With Kyuubi's training, Naruto would realize his true potential and become more self - assured. He'd be less likely to doubt himself in battles.
His character could become more complex. He might struggle with his new identity as part Kyuubi. There could be internal conflicts between his human side and the Kyuubi side.
Naruto's character could develop in many ways. He might become more adaptable as he has to adjust to a completely new place. His sense of justice could expand as he encounters new forms of good and evil in Haven. He may also learn to control his powers in new ways, perhaps combining his ninja techniques with Haven's magic if possible.
On the other hand, forsaking Konoha could also make Naruto more empathetic towards those who are outsiders or outcasts. He has now experienced what it's like to be on the other side of Konoha's walls, so he might be more likely to help those who are in a similar situation. He could start to form his own group of allies who are also misfits, and together they could work towards a new kind of justice that is different from Konoha's.
Naruto becomes more confident. With the Kyuubi soul, he has a new source of power that makes him feel like he can take on bigger challenges. For instance, he might be more assertive in battles and negotiations.
In this fanfic scenario, Naruto's character development would be complex. Initially, he would be in denial or disbelief about being the Kyuubi. But as he experiences things like the power surges and the reactions of others, he would start to accept it. His relationships would be strained as some may fear him. But through these challenges, he would develop a stronger sense of self. He would have to re - evaluate his goals and values, and in the process, become a more complex and interesting version of himself. For example, he might start to see the world from the Kyuubi's perspective, which would give him a new understanding of the balance between power and restraint.