Some of the existing Naruto series characters might also play important roles. Kakashi, for instance, could come to the Rain Village to assist Naruto or to investigate something. His wisdom and combat skills would be valuable in the story.
Naruto is likely to be one of the main characters, of course. He would be the center of the action in the Rain Village setting.
Of course, Naruto himself is very popular in these fanfictions. Writers often put him in situations within the Rain Village that test his beliefs and his ninja skills. For example, he might have to face off against a new and powerful enemy in the Rain Village while also trying to understand the complex politics of the village.
There's also the type of character who is an outcast in the Rain Village but has a heart of gold. They might be shunned because of their different beliefs or appearance. In fanfiction, they often end up becoming the hero, proving everyone wrong and uniting the village. This character is relatable and interesting to readers.
Rain is the key character here. He's the one in the difficult situation of being shackled to the Dark Gundam. The Dark Gundam is not just a machine but can be considered a character with its own motives and powers. Additionally, there could be a mentor - like figure for Rain. Maybe an older, more experienced pilot who has some knowledge about the Dark Gundam and tries to guide Rain in his struggle. There could also be antagonists other than the Dark Gundam, such as those who oppose Rain's attempts to free himself for their own self - serving reasons.
Sasuke is often a main character in such fanfictions. He could be Naruto's right - hand man, using his skills and intelligence to support Naruto's rule. Their relationship might be more complex, with Sasuke having to come to terms with Naruto's new position of power.
There could also be some original characters created specifically for this fanfiction. For example, a powerful ninja who has knowledge about the merge process and tries to either help or hinder Naruto. Or perhaps an ancient spirit that was somehow involved in the creation of Dark Naruto in the first place and now has an interest in the merge.
The main characters are often Naruto, as he is the focus of the mecha concept. Shikamaru could also be a main character in this type of fanfiction. He would be the strategist, trying to figure out how to best utilize the mecha Naruto in battles. Additionally, Orochimaru might be a character in some cases. He could be interested in stealing the technology of the mecha for his own evil purposes or trying to manipulate Naruto through it.
Often, in Naruto Blackfire fanfiction, Sakura can also be an important character. She might be jealous of the new relationship between Naruto and Blackfire, or she could work together with them. Sasuke may also make an appearance, especially if the story involves some sort of threat to the ninja world that requires his power. So, while Naruto and Blackfire are central, other characters from the Naruto universe play significant roles as well.
Obviously, Naruto is one of the main characters. He brings his own set of skills, values, and personality to the ANBU setting. Another main character could be Kakashi. Since he has experience in ANBU and also has a connection with Naruto, he could play an important role in guiding Naruto or being involved in the same missions.
Obviously, Naruto and Kira are the main characters. Naruto, with his determination and never - give - up attitude. And Kira, who could be a new character with her own set of skills and a mysterious background.
In most Naruto Ace fanfiction, Naruto and Ace are front and center. But sometimes, other characters from both universes might also play important roles. For instance, Sakura could be involved if the story is set in the Naruto world and she has to deal with the arrival of Ace. Or Luffy might be mentioned in relation to Ace's backstory and how it affects his relationship with Naruto.