In Naruto scelesial spirt fanfiction, often the main characters are those who have a thirst for power or a special destiny. Naruto is a common one as he is always seeking to become stronger. Kakashi could be another, given his vast knowledge and experience. He might be the one to discover the scelesial spirt first. And then there's Hinata, whose gentle yet strong nature could be a perfect match for the scelesial spirt, especially if it has some kind of spiritual or emotional aspect.
In Naruto scelesial spirt fanfiction, a great concept is the role of the scelesial spirt in the overall plot. It could be a key factor in a war between villages. The scelesial spirt might possess knowledge that the characters need to solve a major problem. Additionally, the fanfiction could explore how the scelesial spirt interacts with different ninja techniques. It might enhance certain techniques or create new combinations. The appearance of the scelesial spirt and how it manifests itself physically can also be an interesting point to consider.
I'm not sure specifically as there could be many different 'Spirt King' light novels. It might be about a king in a spiritual realm, his adventures, the politics in that world, or his journey to gain more power and knowledge in the spiritual domain.
A great 'fighting spirt crossover fanfiction' might be a 'My Hero Academia' and 'Attack on Titan' crossover. The heroes' determination to save and the Survey Corps' courage in the face of Titans would create a unique dynamic. Also, a 'Sailor Moon' and 'Power Rangers' crossover could show the different fighting spirits of the magical girls and the rangers as they team up against common enemies.
Often, Naruto himself might be associated as he is the main character of the original series. Writers may give him the devil bloodline to explore how it changes his character and abilities.
Naruto himself could be one. Imagine him getting a hold of a legendary weapon that enhances his already powerful Rasengan. Sasuke is also a likely candidate as his quest for power could be intertwined with a legendary weapon.
Naruto himself is often associated with it. Since he is the main character of the series, many fanfictions explore his potential with the Lightning Armor. He might learn to use it in unique ways, like combining it with his Rasengan.
Naruto himself could be one of the main characters associated with it. Since he has such iconic spiky hair, it's easy to imagine him developing some unique hair jutsu. Sakura might also be involved, as her long hair could be used in interesting ways in fanfiction. And Sasuke, his cool and somewhat long hair could also be a factor in hair jutsu - related stories.
Sasuke might also be a main character in such fanfiction. His Sharingan and his own strong chakra could potentially be used in relation to the chakra arrow. He could use his Sharingan to predict the path of the chakra arrow or enhance its power.
Sasuke is often a character associated with black chakra in fanfiction. Given his natural inclination towards power and his dark past, it's easy to imagine him being connected to such a powerful and mysterious form of chakra.
Often, Naruto himself might be associated with it. Writers could explore the idea of Naruto unlocking the Celestial Release as a new power, perhaps during a time of great need in the story. This would give him an edge against powerful foes.