Who would be the most powerful character if 'Naruto' and 'Gremory Highschool DxD' universes merged in fanfiction?

It could be Issei if he were to gain Naruto's abilities. He already has his own set of powerful skills in the DxD world. Adding Naruto's chakra and jutsus like the Rasengan or the ability to summon toads would make him extremely formidable.

Probably Great Red from Highschool DxD. He's already an extremely powerful being in his own universe. If he were to encounter the power of the Omnitrix and all the alien forms in Ben 10, he could potentially assimilate or use those powers in some way to become even more powerful.

It's hard to say for sure, but some might argue that it could be Julius Novachrono from Black Clover. His time - magic is extremely powerful, and he could potentially manipulate time to his advantage in battles against the Highschool DxD characters. He could stop time and land fatal blows before his opponents even realize what's happening.

I think it could be a combined form of a character. For example, if Issei were to somehow gain the power of the Nine - Tailed Fox. He already has his Boosted Gear and his experience in battles in the Highschool DxD world. Adding the Nine - Tailed Fox's chakra would make him an extremely formidable opponent. He could use the fox's chakra to enhance his Sacred Gear even further, and his new form might have abilities that are a combination of both universes, like using the fox's tails as a weapon while also having the power of the Boosted Gear.

One might argue that the Sage of Six Paths from Naruto would be the most powerful. He has the ability to create and shape the world. But in the context of a merged universe with World of Warcraft, the Lich King also has great power. He commands the undead and has powerful necromantic abilities. If they were to face off, the Sage of Six Paths' positive energy - based powers might be at odds with the Lich King's necromancy. It would be a battle of two very different but extremely powerful forces.

It could be Naruto. His ability to use chakra and his many powerful jutsu like the Rasengan and the Sage Mode would give him an edge. He also has great determination and a never - give - up attitude. He could probably adapt to the magic in the Harry Potter world quite well and use it in combination with his ninja skills.

It's hard to say for sure, but Naruto in his Sage of Six Paths mode is extremely powerful. However, Yuno from Future Diary has her own set of very deadly and unpredictable powers. If she were to target Naruto without him knowing, she could potentially be a huge threat. But Naruto also has the ability to sense danger and his large amount of chakra might give him an edge in a long - drawn - out battle.

It's hard to say for sure, but Dante would be a strong contender. His experience in fighting demons and his vast array of weapons and abilities make him a formidable force. He has his devil trigger which significantly boosts his power, and his swordsmanship is top - notch. However, Naruto also has his own strengths. With the power of the Nine - Tails and his ability to use various powerful jutsu, he could also hold his own. But if we consider adaptability to different types of enemies, Dante might have an edge as he's used to facing all kinds of demons.

Kirito has a strong case too. He has a lot of experience in virtual reality combat and is a very skilled swordsman. In a merged universe, he could potentially learn some ninja techniques from Naruto and combine them with his own sword skills. He is also very adaptable and intelligent, which would help him face off against powerful Naruto characters. However, Naruto's raw power might still overshadow him in the end.

Akeno Himejima from Highschool DxD has her powerful lightning abilities. If she were to face off against someone like Bakugo from My Hero Academia, it would be an interesting match. Bakugo has his explosive quirk and his aggressive fighting style. Akeno, on the other hand, has her elegance and control over lightning. It would depend on the situation and how their powers interact in the fanfiction scenario.