In a 'naruto spirit bomb fanfic', Naruto is the central figure. However, Kakashi could be a key character too. He might be the one to guide Naruto in understanding the concept behind the spirit bomb - like power. Also, characters from the Akatsuki like Itachi or Pain could be antagonists. Itachi might be interested in Naruto's new power for some mysterious reason, and Pain could see it as a threat to his plans for the ninja world.
Obviously Naruto would be the main character as it's a Naruto - related fanfic. But other characters like Sasuke could also be important. Sasuke might be initially skeptical of Naruto's new spirit bomb - like ability or could even be jealous. Sakura could play a role in helping Naruto master this new power, maybe by using her medical ninjutsu to keep Naruto in top shape during his training.
The main characters would be Naruto and Erza. Naruto is known for his rasengan and his ability to make friends. Erza is famous for her various armors and her leadership in Fairy Tail. In this fanfic, their spirits interact, so they are the central focus. There might also be some side characters from their respective universes like Sasuke from Naruto's world or Gray from Erza's world who could play supporting roles.
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.
It could still be Naruto himself. Since he's the central character in the original series, many fanfics would likely continue to build on his story.
A 'naruto spirit bomb fanfic' could be centered around the spirit bomb concept borrowed from Dragon Ball. In Naruto's world, it might be a fan - created story where Naruto discovers a new power that is similar to the spirit bomb. This could be due to some sort of cross - dimensional event or an ancient power that was hidden in the Naruto universe all along. It might also be a way to bring together different ninja clans to contribute their energy to create a super - powerful attack.
Obviously, Naruto himself would be the main character. Since it's about him growing tails, he's at the center of it all. The Nine - Tails would also play a crucial role. It's the source of his tail growth. And his friends like Sasuke and Sakura are likely to be important too. They'll probably be involved in Naruto's journey and how he deals with his new situation.
Most likely Naruto himself. Since it's in the Naruto universe, he's often the central figure. His friends like Sasuke, Sakura, and Kakashi could also be main characters as they usually accompany Naruto on his adventures.
Obviously Naruto is one of the main characters since it's about him watching the future. Sasuke would also likely be a key character, given their long - standing relationship. And Kakashi, as Naruto's former teacher, could play an important role too.
From the Tsukune side, Tsukune would be there as the character being bashed. His friends from his own story might also make an appearance, but mainly to be overshadowed by the Naruto characters. For example, Moka could be in it, but the focus would be on how Naruto characters are better in various aspects compared to her and Tsukune.
Obviously, Naruto and Inoichi are the main characters. Naruto is the one being adopted, and Inoichi is the one doing the adopting.
Obviously, Naruto and Tenzo would be the main characters. Naruto, as the one being trained, is the protagonist of the Naruto series. And Tenzo, with his unique skills, is the trainer in this fanfic.