How does the concept of 'Naruto banished demon' change the Naruto universe in fanfictions?

Well, it changes a lot. Firstly, it disrupts the relationships. His friends like Sasuke and Sakura would be affected. They might feel abandoned or confused by his new attitude. Secondly, the power dynamics in the villages change. Without Naruto's usual care for justice and protection, other forces could rise and try to take over. For example, some hidden villages might see this as an opportunity to expand their territory.

The concept can change the Naruto universe by opening up new storylines. Instead of just the typical ninja missions and battles against the main villains, there could be stories about Naruto trying to understand the true nature of Kyoka Suigetsu. He might have to go on a journey to find out more about the power's origin, and this could lead to exploring new parts of the Naruto world that were previously unknown.

In many fanfics, when Naruto gets banished because of his bloodline, it completely alters his relationship with the village. Instead of being the hero they come to accept, he becomes an outcast. This changes the power dynamics as he has to rely on his own strength and his bloodline abilities more than ever, without the support of the village like in the original story.

It changes the power structure. If Naruto is a demon, he may have powers that are more raw and uncontrollable. For example, he might not be able to rely on chakra in the same way.

It changes the Naruto universe by adding a new element of magic. In the original Naruto, there is mainly ninja magic. But with fem Naruto being a mermaid, there is now water - based magic. For example, she could use her mermaid powers to create water barriers or communicate with sea creatures, which is completely different from what normal ninjas can do.

It changes the power dynamics. Usually, Naruto is a force for good, but as an evil avatar, he becomes a major threat. Villages that once saw him as an ally would now need to strategize against him. For instance, Konoha would have to find ways to contain him without harming him too much, as he was once one of their own.

It adds an element of mystery. Suddenly, there are things in the Naruto world that not everyone can perceive. This can lead to Naruto having a unique role, like a bridge between the living and the dead. For example, he could use the knowledge from ghosts to prevent disasters.

In the 'Naruto Mata Sharingan' fanfiction, it can also change the training and development of characters. A character with this combination of powers would need to train in both Naruto - style chakra control and Sharingan - related skills. This would open up new training methods and challenges. They might also discover new jutsus that are a combination of the two power sources. This would not only change the individual characters but also the overall balance of power in the Naruto universe, as new and unexpected abilities emerge from this unique combination.

In fanfictions, the necromancer bloodline often changes the Naruto universe by introducing new moral dilemmas. Since raising the dead goes against the natural order, characters with this bloodline have to decide whether to use their power for good or evil. This can lead to complex character development and interesting story arcs. Also, it can change the way battles are fought. Instead of just physical combat, there could be battles of necromantic magic, which is a whole new aspect not present in the original Naruto.

In some fanfictions, the 'Naruto Fox Sage' concept might be enhanced by giving Naruto more control over the fox's chakra. For example, he could use it to perform new jutsu that were not possible in the original series. In others, the Fox Sage mode might have different physical appearances or side effects. Sometimes, the fanfictions might also explore the spiritual connection between Naruto and the Fox Sage in more depth, like Naruto being able to access the Fox Sage's memories.