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.
It could be about a nightmare scenario within the world of Lord of the Rings that has some sort of beauty in it. Maybe it's a dream where a character faces a great danger in Middle - earth but there are also elements like the beauty of the landscape or the courage shown that make it 'beautiful' in a way.
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.
Frodo Baggins is one of the main characters. He is a hobbit who undertakes the great task of destroying the One Ring. Another important character is Gandalf, the wise wizard who guides and helps Frodo along the way.
The main characters could include the classic ones from 'The Lord of the Rings' like Frodo Baggins, who has the task of destroying the One Ring. Then there's Aragorn, the rightful king, who is important in the fight against Sauron. Gandalf the wizard also plays a major role in guiding and protecting the Fellowship.
In the 'lotr graphic novel', Frodo is central as he endures the great burden of the ring. Samwise Gamgee is another important character. He is Frodo's loyal friend and accompanies him throughout the journey. Legolas, the elf, and Gimli, the dwarf, are also main characters. They contribute to the fellowship and bring their respective races' skills and personalities to the story. Their interactions, like the friendly rivalry between Legolas and Gimli, add depth to the narrative. The villain Sauron, though not always directly present, is a major force that drives the whole plot as the creator of the One Ring.
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.
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.
The main character is Six. She is a small girl who is trying to escape the nightmarish world.