Sasuke could also be a main character. Maybe he is in a rivalry with Naruto over the power of miracle, or they have to work together to control or understand this new power. Their relationship could be further explored in the context of this fanfiction.
There could be original characters created specifically for this fanfiction. For example, a mysterious figure who is the source of the power of miracle. This character could have their own backstory and motives, and play a crucial role in the development of the story. They might be guiding Naruto or other characters on their journey to understand and utilize the power of miracle.
Obviously, Naruto is a main character as it's related to him having the power of light. His friends like Sasuke and Sakura might also play important roles. They could be either helping Naruto master this new power or being protected by him when he uses it.
It could be Naruto himself. Since he is the main character of the original series, in this fanfiction, he might be the one who has to face or even possess the power of destruction.
In the 'naruto power of the sun fanfiction', Naruto is the central figure. But other characters may also be significant. Shikamaru, with his strategic mind, could be involved in planning how Naruto can best utilize this power. Hinata might also be a main character as she has always been close to Naruto. Her support and unique abilities could be important in Naruto's journey with the power of the sun. And don't forget the Akatsuki members. They could be major antagonists in this fanfiction, trying to either stop Naruto from growing stronger with this power or use it for their own ends.
Madara Uchiha is another character who could be central in such a fanfiction. He had his own reasons for hating the world and seeking power. The 'power of hate' in a fanfiction could be used to delve deeper into his motives and actions, perhaps showing how his hate not only influenced his own life but also had far - reaching consequences for the entire Naruto universe.
I'm not sure specifically as I haven't read this particular fanfiction. But usually, it could be the main characters from the original work that the fanfiction is based on, just with different character arcs or relationships in this new story.
In most 'naruto godlike power fanfiction', Naruto is the central figure. However, Kakashi can play an important role too. He might be the one to guide Naruto in understanding and controlling his godlike powers. Additionally, villains like Orochimaru or Madara could be main characters as they would be interested in Naruto's powers and try to either steal them or destroy Naruto to prevent him from becoming too powerful.
Naruto is the central figure for sure. But characters like Kakashi could play a role too. He might be guiding Naruto in his journey to master the full power of the Kyuubi. Also, characters from the Hidden Leaf Village, such as Sakura, Shikamaru, and others, could be part of the story. They might react to Naruto's new power in different ways, either with awe or concern.
Naruto is very likely to be one of the main characters. Since he is the protagonist of the original series, in a fanfiction about power of dominance, he could be the one to obtain or face this powerful force. Sasuke is also a strong candidate as he is Naruto's rival and has his own pursuit of power. Another possibility is Madara Uchiha. His powerful abilities and his desire for control in the original story make him a prime candidate for a fanfiction dealing with power of dominance.
Obviously, Naruto is often a central character. His journey to discover and master new secret powers is a common theme. Sasuke is also frequently involved, either as a rival or an ally in the exploration of these powers.
Naruto would probably be a central character. Given that he is the protagonist of the original series, in a fanfiction about the power of darkness, his reaction to this new and dangerous power would be crucial. Sasuke is also likely to be involved. His own struggle with power and his complex relationship with Naruto could be further explored in the context of the power of darkness. Kakashi, as a mentor figure, might play a role in guiding or trying to prevent the younger characters from being consumed by the power of darkness.