One possibility in the 'naruto meets zelretch fanfiction' is that they team up to face a common enemy. Zelretch with his powerful magic and Naruto with his ninja abilities could create a very interesting and powerful duo. They might also learn from each other, with Naruto teaching Zelretch about the values of the ninja world like loyalty and perseverance, and Zelretch showing Naruto the vastness of the magical world.
In the 'naruto meets zelretch fanfiction', neither might be truly dominant. They could be equals. Naruto has shown great growth and the ability to overcome powerful foes. Zelretch has his vast magical knowledge and power. They might end up respecting each other's strengths and working together without one being over the other. For example, they could combine their powers in unique ways, like Naruto using his shadow clone jutsu in tandem with Zelretch's magic to create a more powerful attack.
The main characters are clearly Shirou and Zelretch. Shirou is often known for his heroic ideals and his journey in the world of magic and heroism. Zelretch, on the other hand, is a very powerful and mysterious mage.
In the 'shirou meets zelretch fanfiction', Shirou might learn some unique magic from Zelretch. Since Zelretch is a powerful mage, he could have a great influence on Shirou's growth as a mage.
Zelretch is likely a very powerful and perhaps mysterious character in this fanfiction. He could be an ancient wizard or a being from a different magical dimension with knowledge far beyond what is known in the normal Harry Potter universe.
Perhaps Zelretch decides to show Shirou different timelines or alternate realities. This could be a way to both amuse himself and also give Shirou a new perspective. It could also lead to Shirou having to make some tough decisions about his own path based on what he sees in these other timelines.
If Zelretch, in his boredom, decides to meddle with Shirou's life, it could have a huge impact on the story's universe. For example, if he gives Shirou a new power, Shirou might use it to change the course of events in his world. This could lead to a ripple effect, changing the fates of many other characters as well.
It could be the First Hokage, Hashirama. Naruto would be amazed by his powerful Wood - Style jutsu and his ability to create the village. He could learn about the original ideals behind the Hidden Leaf from Hashirama.
Well, it could be about Zelretch somehow getting involved in the Harry Potter universe. Maybe he uses his powers to change the course of events in Hogwarts, or he could be a hidden figure guiding Harry in a different way than Dumbledore.
One common theme could be identity. Since they are gender - switched, they have to re - evaluate who they are and how they interact with the world. Another theme might be friendship or partnership. They often team up in these fanfictions to achieve a common goal. For example, they could be on a quest to save a magical world.