Sasuke could also be a main character. His power and his complex relationship with Naruto would play a role. He might have his own reasons for wanting to either defeat or control the Beast of War, perhaps related to his quest for power or revenge. And Sakura, with her medical ninjutsu skills and her growth as a fighter, could be crucial in treating the wounded during the battles against the beast. She might also have some unique insights into the nature of the beast based on her studies.
Obviously Naruto would be the main character since it's about him time - traveling. Sasuke would also likely play an important role. Maybe he's skeptical of Naruto's time - traveling claims at first but then comes to believe him and helps him change things. Kakashi could also be a major character, providing guidance to Naruto based on his own experiences.
Obviously, Naruto would be one of the main characters as he is from the Leaf Village and would likely lead the charge against the agents of Mist. Sasuke could also be there, as he often teams up with Naruto in important battles. Sakura might be involved too, using her medical and combat skills. And from the Mist side, there could be some important ninja agents who are the antagonists, though their identities would be developed as the story progresses.
Naruto and Sasuke would be very likely to interact. If Naruto has God of War powers, Sasuke might be curious or even envious. They could have a fight or a conversation about these new powers. Another pair could be Naruto and Kakashi. Kakashi would surely be interested in Naruto's new abilities and how they could be used for the village.
Obviously Naruto would be one of the main characters. He's the protagonist of the original series and his power and will would be crucial in a doomsday scenario. Sasuke would also be likely, as his strength and his connection to Naruto are important elements. Sakura, with her medical skills, would also be a key character as she could be responsible for healing the injured during the doomsday chaos.
Well, it's possible that some new or less - known characters from the Naruto universe could become main characters in 'chaos naruto fanfiction'. For example, Rock Lee could take on a more central role. He has always been a character full of determination and unique fighting style. In a chaotic setting, his strong will could be a key factor in dealing with the chaos. And then there are the jinchuriki of the other tailed beasts who might be more prominently featured as they are all related to the power dynamics in the Naruto world which could be thrown into chaos.
Obviously, Naruto would be one of the main characters. Since it's a Naruto - centered fanfiction with the beyonder element added. Sasuke could also be a main character as he is often Naruto's counterpart and rival. They might both be involved in exploring the beyonder powers. Additionally, characters like Kakashi could play important roles. He could be the one guiding Naruto and Sasuke in understanding these new and strange beyonder powers, given his experience and wisdom.
There may be new characters introduced as well. Maybe a mysterious figure who has a special ability to either enhance or dampen Naruto's will to live. This character could add an extra layer of mystery and conflict to the fanfiction.
Naruto would be the central figure. But in this British version, there could be new characters added, like a British wizard - type character who becomes Naruto's mentor in understanding the new 'British - ninja' aspects of his life. And of course, Sasuke and Sakura would be adapted to fit the British setting, perhaps with different family backgrounds that are more in line with British culture.
Definitely Naruto himself. He'd be a central character, causing chaos and bringing energy to the daycare. And Sasuke would also be there, probably being a bit of an aloof kid that Naruto is determined to get close to.
I think Kakashi would be an important character too. He could be Naruto's mentor in this new situation, teaching him how to use his remaining abilities effectively. Also, Sakura might be there, using her medical ninjutsu skills to try and help Naruto with his crippled state.