Sakura would probably be there too. She might be the one to find Naruto when he's shrunken and in trouble. And Kakashi Sensei, he could play a role in training Naruto to control his shrinking ability or using it in battle strategies.
Obviously Naruto himself is the central character as it's about his hibernation. His friends like Sasuke and Sakura are also likely to be involved. They would probably be the ones most concerned about his condition and try to figure out what happened.
Naruto is the primary one for sure. But there could be other characters like Jiraiya. Jiraiya is known for his knowledge of various things in the Naruto universe, and he could play a role in teaching Naruto about demon breeding. Additionally, some of the demon characters themselves could be considered main characters in a sense. They would have their own personalities and goals, and their interactions with Naruto would be a major part of the story. For example, a powerful demon that Naruto is trying to breed might have a complex backstory and motives that drive the plot.
In this fanfiction, Naruto is the key figure. However, characters like Shikamaru, who is known for his intelligence, might also be involved. He could be helping to plan Naruto's welcome or dealing with any potential issues that Naruto's return might bring. Also, Hinata, given her relationship with Naruto, would surely be part of the story. And the elders of the village may also play a role, as they often have a say in important matters regarding the village and its shinobi.
In a 'naruto chronal accelerator fanfiction', Naruto is almost certain to be involved as he is the heart of the Naruto story. However, other characters like Sakura could also play a major role. She might use the chronal accelerator to go back and improve her skills at an earlier time. Additionally, Orochimaru might be interested in the chronal accelerator for his own devious purposes, like trying to gain more power by changing the past or finding new ways to experiment with his immortality.
Sasuke would also likely be involved. Given their long - standing relationship and rivalry in the original series, Sasuke would surely have an opinion on Naruto's connection to the Chaos God. He might either try to help Naruto control this new power or try to take it for himself, depending on how the story is written.
Obviously, Naruto would be one of the main characters. He's the one being betrayed. From RWBY, Ruby, Weiss, Blake, and Yang are likely to be involved. They are the central characters in RWBY, and if there's a betrayal of an outsider like Naruto, they would probably play a significant role in it.
The main character is Naruto for sure. When it comes to the Anbu, there could be some new and original Anbu characters created just for this fanfiction. They could have unique abilities and personalities. Naruto's relationship with these made - up Anbu characters could be really interesting. He might prank them in ways that play off of their individual quirks. For example, if one Anbu is really proud of his speed, Naruto could set up a prank that makes it seem like he's much slower than he thinks.
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.
Well, obviously Naruto and Sasuke are the main ones. Since it's about Naruto absorbing Sasuke, their relationship is at the core. But also, characters like Kakashi could be involved. He might be the one guiding Naruto on how to control his new powers or trying to understand the implications of this strange occurrence.
Kakashi could also be an important character. He has a lot of experience and wisdom. When Naruto gets high, Kakashi might be the one to guide Naruto through this strange state, using his own past experiences and knowledge of different ninja techniques. And then there's Jiraiya. Given his relationship with Naruto, he would surely be involved, perhaps trying to use his own unique jutsu to help Naruto come back to normal.