Well, Naruto is the most obvious main character. He would be exploring the boundaries of his powers in this fanfiction world. But it's possible that some mutant - like characters from the Naruto universe, like Gaara with his sand - controlling abilities that could be seen as mutant - like, could also be main characters. Additionally, new characters created specifically for this fanfiction that bridge the gap between Naruto's world and the mutant concept could be main characters as well.
One interesting concept could be the combination of Naruto's unique ninja abilities with the super - powered nature of omega - level mutants. For example, Naruto's chakra control and jutsu might be enhanced to a level similar to mutant powers. Another concept could be the interaction between Naruto characters and the mutant - like society in this fanfiction world. Maybe Naruto would be seen as an outlier or a new type of mutant - ninja hybrid.
In this type of fanfiction, characters like Itachi might be very popular. His already - complex character can be made even more so with omega - level mutant powers. He could have the power to manipulate shadows in a more extreme way, similar to a mutant ability. Also, Rock Lee could be popular if he is given mutant - like super strength and speed that take his taijutsu to a whole new level.
Often, original characters created by the fanfic authors themselves become popular. These are the ones with really unique omega level powers and interesting backstories. For example, a character who can control all forms of energy and has a tragic past of being experimented on by an evil organization.
Some original omega - level mutants created specifically for the fanfiction can also become popular. For example, an omega - level mutant with the power to manipulate time might be a really cool and popular character. Their interactions with the SI character and how they use their power to change or protect the mutant world can make them stand out.
It could be an original omega mutant character created specifically for the fanfic. This character might have abilities that are a blend of Naruto - like ninja skills and mutant - like powers.
Itachi can be a very interesting character in Naruto omega mutant fanfiction. His past actions and his own powerful abilities can contrast and interact with Naruto's omega mutant nature. Jiraiya is another one. He could be the one who first discovers Naruto's mutant abilities and helps him start on the path of understanding and mastering them. Then there are the Akatsuki members, whose motives and actions can be affected by Naruto's new omega mutant status.
Hermione could be a great main character. Her intelligence combined with omega - level mutant intelligence or some kind of knowledge - based power like eidetic memory as a mutant ability would be really interesting. She could use her mutant ability to solve magical problems in new ways.
Well, in 'Naruto omega level mutant fanfiction', there might be the idea of mutant - like transformations in the Naruto universe. Imagine Naruto himself having a transformation that gives him omega - level mutant strength and abilities. Also, the exploration of different chakra natures as mutant - like powers. Fire - style chakra could be seen as a mutant power related to heat and combustion.
Yes, there are some interesting ones. You can try searching on fanfiction platforms like Archive of Our Own. Just type in the keywords 'Harry Potter Omega Level Mutant' and you'll likely find a variety of stories. Some might combine the magic of Harry Potter with the concept of Omega Level Mutants in really creative ways.
One common theme is power. How the Omega Level Mutant powers interact with the magic in Harry Potter's world. Another could be identity, like a character struggling with being both a wizard and having mutant abilities. Also, there might be themes of acceptance, as the characters deal with being different in two very different ways.