The main character in 'naruto nightmare orphan fanfiction' is the orphan, but there could be a whole cast of characters around them. There might be an older ninja who takes the orphan under their wing, similar to how Kakashi took Naruto and his friends on as students. There could also be characters from the different ninja clans that interact with the orphan in various ways. Some might be sympathetic and try to help, while others could be more hostile due to clan politics or prejudices. And of course, there could be other orphans in the story who share similar experiences and bond with the main orphan.
Since it's a fanfiction about an orphan in Naruto, one of the main characters is likely the orphan themselves. It could be an original character created by the fanfiction author. There might also be some Naruto - universe regulars like Naruto himself, as he was also an orphan and could potentially play a role in the story, either as a mentor or a friend to the new orphan character.
In this 'naruto nightmare orphan fanfiction', the main character is surely the orphan. However, depending on the plot, other characters could be important too. For example, if the orphan is part of a ninja academy, the teachers there like Iruka could be significant characters. Also, there could be other orphan characters that the main orphan befriends, and together they form a sort of 'orphan group' within the story. And don't forget about possible antagonists, like rogue ninjas who might target the orphans for some evil scheme.
This 'naruto nightmare orphan fanfiction' could potentially center around an orphan who has nightmares due to their past. In the Naruto world, it could be that they lost their family in a battle or some sort of shinobi - related incident. The story might then follow their journey as they try to overcome these nightmares, perhaps by finding a new family or purpose in the form of a ninja team or a mentor. They could also be facing threats from villains who target orphans, and the story would show how they fight back and grow stronger.
The main characters could be a new generation of ninja students in the Naruto world. They stumble upon the knowledge of 'Nightmare Release' and have to deal with the consequences. This could include a young ninja who has a natural affinity for this strange power and has to learn to control it while facing the challenges from other ninjas who fear or want to use this power for their own gain.
It really depends on the specific fanfiction. However, it could feature Naruto himself dealing with a character who has the nightmare bloodline and trying to understand their motives.
Obviously Naruto himself would be a main character. He would be the one to bring his ninja skills and determination into this strange combination of worlds. Sasuke could also be there, maybe as a rival who has different ideas on how to deal with the Gundam - related threats. And from the Gundam side, Amuro Ray could be a key character. He might be the one who first discovers Naruto and his group and has to decide whether to help or oppose them.
Obviously, Percy is one of the main characters since the title mentions him. There might also be a mentor figure, someone who takes Percy under their wing and helps him navigate his life as an orphan.
Perhaps there's also a mentor - like character. This could be someone who has had past experiences with the Nightmare Man and provides guidance to the protagonist, sharing secrets about the Nightmare Man's weaknesses and the nature of his existence.
There could be a new character that is the focus of the 'beautiful nightmare'. For instance, a young hobbit who discovers a hidden and dangerous power in the Shire. But the original characters like Merry and Pippin might also be involved, guiding or helping this new character through the nightmare situation while also dealing with their own fears and challenges within the LOTR world.
We don't really know for sure without more context. But likely, the central character is the orphan. There might also be other characters such as relatives who couldn't take the orphan in, or friends the orphan made along the way. If the story is set in a particular place, there could be local community members who were either positive or negative influences on the orphan's life.
Not having read 'the orphan boy story', it's hard to say for sure. However, the orphan boy himself is the central character. There could be other orphans in the story who become his friends or rivals. There may also be an adult figure, like a teacher or a priest, who plays an important role in the boy's life, either by guiding him or by providing some form of support or challenge.
The main character is surely the little orphan. There could be other characters like other orphans in the same place who are friends or rivals. And there might be adults in the story, like a strict orphanage director who creates some of the challenges for the main orphan character, and a friendly neighbor who offers some help or a different perspective to the orphan.