Naruto's abilities would likely disrupt the power balance significantly. His Rasengan alone is a very powerful attack. In the Highschool DxD universe, where most powers are based on magic and demonic or angelic abilities, Naruto's chakra - based attacks would be something new. His ability to create thousands of shadow clones could also give him an edge in battles and in other aspects like gathering information. For example, he could send clones to different areas to spy on the various factions in the Highschool DxD world.
His speed would likely be enhanced. In the DxD universe, there are fast - moving opponents like the devils and angels. Naruto, already known for his incredible speed in his own world, would need to adapt and become even faster. His rasengan, for instance, might be modified to be more effective against the magical defenses of DxD characters.
Naruto's chakra abilities would likely be seen as a very unique form of power in the DxD universe. His ability to use shadow clones could be a great advantage in battles or even in daily school life in the DxD setting. He could send clones to attend different classes or spy on enemies. His Rasengan, being a powerful concentrated form of chakra, might be equivalent to a very high - level magic attack in the DxD world, and could potentially be enhanced further by the magical energy present there.
Naruto's abilities would bring a whole new dynamic to the Highschool DxD universe. His ability to use chakra to walk on walls and water could give him an advantage in certain terrains or situations. In battles, his ability to sense chakra could help him detect hidden enemies. Also, his summoning jutsu could call upon powerful creatures from the Naruto universe. If these creatures were introduced into the Highschool DxD world, they could change the balance of power. And his various transformation jutsu could be used for disguise or to gain temporary boosts in power.
Itachi's combat abilities could be enhanced or modified. With the presence of different magical and supernatural elements in Highschool DxD, his chakra-based attacks could potentially be combined with the ambient magic in that world. For instance, his fire - style jutsu might gain new properties when used in an area filled with demonic or angelic energy.
In a fanfiction, the power systems could combine in interesting ways. For instance, the chakra in Naruto could be related to the magic in Highschool DxD. Maybe a character could use chakra to enhance their magical abilities. Or, the devil's powers in Highschool DxD could be used to boost the physical abilities of a Naruto character, similar to how the Nine - Tails chakra enhances Naruto's strength.
In terms of the overall story, Naruto would add a new layer of mystery and excitement. His backstory as a ninja from another world would be fascinating to the other characters. His training methods and the way he views strength could also influence the characters in Highschool DxD. They might start to adopt some of his ways of thinking, like believing in hard work and perseverance to become stronger.
Well, if there are extremely powerful bloodline abilities in fanfiction, it can tip the power balance. For instance, if a new bloodline allows instant teleportation across long distances without any chakra cost, it would make battles and missions very different. It could make some characters overly dominant and change the strategic landscape of the Naruto world.
His projection magic might be affected by the different magical rules in the Highschool DxD world. Maybe it becomes more powerful or has some new limitations. For example, projecting holy swords could have a different energy cost or be more effective against certain types of devils or fallen angels.
His chakra control might be affected by the different magical energies in the DxD world. Maybe his chakra could interact with the devil or angelic powers in unexpected ways. For example, his Rasengan could gain new properties if combined with devilish power. His shadow clones might also be able to do things like sense magical auras, which they couldn't do in the Naruto world.
If Naruto had a time - skip ability, it would likely disrupt the power balance significantly. He could skip to a time when he has mastered new jutsus and bring that knowledge back to the present, making him much more powerful than his opponents. This would make him a formidable force and potentially change the way battles are fought in the ninja world.