What would be the relationship between Naruto and Inuyasha if Naruto is Inuyasha's brother in fanfiction?

It's really hard to say. Naruto has his incredible chakra powers, his ability to go into different forms like Sage Mode and Nine - Tails Mode. He's also a very skilled ninja with a lot of combat experience. But Inuyasha has his demon strength, his Tessaiga which can cut through almost anything, and his ability to sense demons. In a straight - up fight, it would probably depend on the situation, like the terrain and whether they have any prep time.

A popular 'Inuyasha Naruto' fanfic is 'Merged Destinies'. In this fanfic, the author does a wonderful job of bringing together the magic and powers from Inuyasha's world and the ninja techniques from Naruto's world. It's full of action - from epic battles between the combined forces against powerful villains to the personal growth of the characters as they learn from each other's cultures. There are also some really cool character pairings that you wouldn't expect but work really well in the story.

The relationship would likely become more intense. They would have to rely on each other more, and their bond would deepen as they are about to become parents. Inuyasha would probably become more protective of Kagome.

One possible plot could be that Naruto discovers he has a long - lost brother who is Inuyasha. They meet in a strange dimension where the worlds of Naruto and Inuyasha collide. Naruto, being his usual self, wants to understand his new - found brother and tries to bond with Inuyasha. Inuyasha, on the other hand, is initially skeptical but gradually warms up to Naruto as they face common enemies together in this new merged world.

First, you need to understand the two universes well. Know the characters, their powers, and the rules of their worlds in Inuyasha and Naruto. For example, in Naruto, chakra is a key element, and in Inuyasha, there are demons and magic. Then, come up with a unique plot. Maybe it could be about a character from one world ending up in the other and how they adapt.

One common theme is the power struggle. Since both Naruto and Inuyasha are powerful in their own right, in a harem fanfic, they often have to deal with other powerful female characters, which leads to power dynamics and struggles. Another theme is friendship. Despite the harem aspect, the bond between Naruto and Inuyasha usually remains strong and they support each other. Also, love triangles or more complex relationship webs are common as multiple female characters are involved with Naruto and Inuyasha.

One way this could work in fanfiction is if there was a crossover of universes. Some kind of rift or magical event could have brought their two worlds together. And perhaps they were born from the same source in a new, combined reality. Their relationships with their friends in their respective shows could also be affected. For instance, Sasuke and Kagome might have to deal with this new family dynamic as well.

Their relationship could start off as a bit rocky. Inuyasha might be a bit impatient with Rin's naivete at first. But as they face challenges together, like fighting off demons or finding their way through a maze - like forest, they start to respect each other. Rin would look up to Inuyasha's strength, and Inuyasha would come to appreciate Rin's kind heart.

The theme of redemption can also be explored. Suppose a villain from Naruto's world ends up in Inuyasha's world. The different environment and the values of the people there might make them question their actions and seek redemption. It's an interesting way to give depth to otherwise one - dimensional characters.

One way is through crossovers. For example, a character from Naruto could accidentally end up in the world of Inuyasha. They might use their unique ninja skills, like Naruto's shadow clones, to help fight Inuyasha's enemies. This would add an interesting dynamic as the ninja abilities are different from the demon - slaying techniques in Inuyasha's world.