How does Naruto's character develop in Naruto has the curse mark fanfiction?

He could develop a deeper understanding of the darker side of power. The curse mark represents a power that has a cost, and Naruto has to grapple with that. This might make him more empathetic towards characters like Sasuke, who also had to deal with dark powers. For example, he may start to see that there are no easy answers when it comes to power and its consequences. He might also become more secretive as he tries to hide the curse mark from his friends and village at first, until he fully understands it. This secrecy could isolate him somewhat, but also force him to rely more on his own inner strength.

Naruto may become more cautious. With the curse mark, he realizes he has a power that can be dangerous. So he becomes more careful about his actions, not wanting to accidentally harm others with the mark's power.

The curse mark could also make Naruto more in - touch with his own heritage. Maybe the mark has some connection to an ancient Uzumaki power or secret. As he explores the mark, he learns more about his family's past and the powers they once held. This new knowledge could give him a sense of pride and purpose, and also change the way he views his role in the village. He may no longer see himself as just the goofy, underdog ninja, but as someone with a unique and important connection to a greater power, which could lead to a more confident and mature Naruto.