Definitely Naruto from the Naruto series. And from the X - Men, characters like Wolverine or Professor X are very likely to be main characters as they are some of the most well - known X - Men.
The main characters would probably include Naruto. His determination and ability to grow in power are key aspects of his character that would be interesting to explore in the context of the X - Men world. From the X - Men, Rogue could be a main character. Her power - absorbing abilities would create some really unique situations. For example, if she were to touch Naruto, what would happen to his chakra? How would it affect her? And Magneto could also be a major character. His views on mutants and his powerful magnetic abilities would make for some intense scenes when he comes into contact with Naruto and the ninja world.
In this 'between two worlds naruto x men fanfic', Naruto would be a main character for sure. His unique powers and personality would drive a lot of the story. On the X - Men side, Cyclops could also be a main character. He is a natural leader in the X - Men group. His optic blasts and leadership skills would make for interesting interactions with Naruto. Also, Storm with her weather - controlling powers could play a major role. Her powers are very different from what is seen in the Naruto world, and her personality would add another layer to the story when she meets Naruto and his friends.
I'm not sure specifically as there could be many different plots for such a fanfic. It might involve Naruto characters being transported to the X - Men world or vice versa, and then they have to deal with the different powers, cultures and challenges in that new world.
The plot could involve Naruto characters being transported to the X - Men world or vice versa. They might team up to face a common threat that is affecting both worlds, like a powerful villain who is stealing chakra and mutant powers. Maybe Naruto and Wolverine could bond over their shared experiences of having a power within them that they have to constantly control.
Naruto is the main character without a doubt. Besides him, characters like Hinata could be important. Hinata has deep feelings for Naruto, and if Naruto is in a strange state of being between two worlds, Hinata might play a role in bringing him back or helping him through it. Also, Pain could be a significant character if the two worlds are related to the different ideologies that Pain and Naruto represent, such as Pain's view of a world in pain and Naruto's view of a world at peace.
I think Naruto and Rogue would be an interesting pairing. Naruto has a strong will and positive energy, and Rogue is always worried about her power harming others. Naruto could perhaps help Rogue gain more confidence in herself and her abilities. Also, his chakra might interact in an unexpected way with Rogue's power - absorption ability.
Obviously, Naruto would be one of the main characters. He brings his ninja skills, his strong will, and his unique personality. And from the Rias family, Rias herself would be a main character. She has her own leadership within the family and her devil powers. Also, her peerage members could also be important characters as they interact with Naruto.
Sasuke and Magneto. Both are complex characters with a bit of a dark side. They could either become enemies as their goals might clash. Sasuke is on a journey to gain power for revenge, and Magneto wants to protect mutants but sometimes uses extreme methods. Or they could form an unlikely alliance, learning from each other's determination and power - seeking motives.
Well, obviously Naruto himself would be the main character. There could also be his friends like Sasuke and Sakura, who might be involved in the interactions between the two Narutos. Maybe they are confused at first by seeing two Narutos, but then they help them figure out what's going on.
Definitely Wolverine and Deadpool. They have a lot in common, like their regenerative abilities and their combat skills. Their interactions could be really interesting, with Wolverine being all serious and Deadpool cracking jokes all the time.
For sure, characters like Captain Kirk from Star Trek would be a main character. He's a natural leader and would likely be at the forefront of any interaction with the X - Men. From the X - Men side, Wolverine is a very likely candidate. His tough - as - nails attitude and combat skills would make him stand out in the Star Trek universe.
They could be students. Yamada might be good at math but struggle in literature, and Shiraishi could be the opposite. Their different academic strengths and weaknesses could lead to some interesting interactions, like them helping each other study and getting to know each other better in the process.