Sasuke could be a great main character. He already has a complex backstory and a lot of internal conflict. In a Naruto Shugo Chara fanfic, his Shugo Chara could represent his search for revenge or his later - in the series - desire to protect the village. His journey of self - discovery could be enhanced by the addition of the Shugo Chara concept.
One idea could be a crossover where the characters from Naruto and Shugo Chara meet in a strange new world. They could team up to fight a common enemy that threatens both their universes. Another idea is to focus on a character from Naruto who suddenly gains a Shugo Chara. For example, Naruto could have a Shugo Chara that represents his dream of becoming Hokage in a more physical and guiding way.
In a Shugo Chara Amu x Tadase fanfic, it could be a story where they are paired up for a school project. At first, they struggle to work together because of their different personalities. But as they start to understand each other better, they realize they make a great team. Along the way, they also have some cute moments that show their growing affection for each other.
Power - up is also a theme. Fans like to imagine how characters from Naruto would gain new powers or abilities if they were in the Shugo Chara universe, or vice versa. It adds an exciting element to the fanfictions as the characters face new challenges with their enhanced capabilities.
One idea could be exploring the backstories of the Guardian Characters in more depth. For example, how did they come to be and what were their experiences before they became Guardian Characters.
Start by creating a detailed outline. Include things like the main conflict, how the characters will develop throughout the story, and any new characters you might want to introduce. For example, if you want to introduce a new Guardian Character, plan out its powers and how it will interact with the existing characters.
There could be 'Shugo Chara Lemon Fanfic' that delves into the backstories of the characters more deeply. For instance, exploring how the characters got their Shugo Charas in the first place, but with a twist. Maybe a character had a different motivation or experience that led to the appearance of their Shugo Chara, and these fanfics expand on that in an interesting and engaging way.
Sure. You can try searching on fanfiction.net. There are often some popular 'naruto shugo chara fanfiction' there. Just use the search bar and type in the keywords.