In a fanfiction, Naruto could inherit some of the combined traits of Hashirama and Madara. For example, he might have Hashirama's ability to connect with nature on an even deeper level, while also having Madara's strategic mind. This would make him an even more formidable ninja. He could use these newfound abilities to face new and stronger enemies, like an ancient evil that once threatened Hashirama and Madara.
In some fanfictions, Naruto can be depicted as Hashirama's descendant. Fanfiction allows for creative interpretations, so authors might create a backstory where there is a family connection between them. However, in the original Naruto series, there is no such indication.
Fanfiction.net is also a good place to search. There are many Naruto fanfictions there. However, the search functionality might not be as refined as AO3. You may need to dig a bit deeper. Browse through the Naruto category and look for tags related to gay relationships between Naruto and Hashirama or just skim through the stories to find what you're looking for.
Yes, it can be quite popular. Many fans are intrigued by the idea of Naruto having a connection to Hashirama through reincarnation. It allows for creative storytelling, like exploring how Naruto might inherit some of Hashirama's abilities or wisdom, and it can add new layers to the existing Naruto lore.
To develop Hashirama's ghost, we could give him a sense of purpose. He could be a protector of the village in the afterlife. So, when he senses a great danger approaching the village, he decides to reach out to Naruto. He could have a deep connection to the natural world even as a ghost, and his powers could be related to manipulating nature spirits. He could teach Naruto how to communicate with these spirits and gain their assistance in times of need.
If Naruto becomes like Itachi in fanfiction, it would change his relationships. His friends might be a bit shocked at first. For example, Sasuke's perception of Naruto would be completely different. Naruto would also have a different role in the village. He might be more involved in the shadowy aspects of protecting the village, like Itachi was. And his enemies would have to re - evaluate their strategies against him.
She could also inherit Kaguya's sense of isolation. Kaguya was alone for a long time, and if Fem Naruto becomes like her, she might start to distance herself from her friends and loved ones. On the other hand, she might use her new powers to protect them in ways she couldn't before, but at the cost of her own emotional well - being.
One common theme is the exploration of different power dynamics. Since Naruto has her own set of powers and Hashirama is known for his great strength, seeing how a female Naruto's powers interact with his can be really interesting. For example, they might combine their jutsu in unique ways.
I think it has the potential to be popular. In fanfiction, unique family relations like Naruto being the grandson of Madara and Hashirama can open up a plethora of new plotlines. For example, it could change Naruto's relationship with Sasuke, as their clans' history would be even more intertwined. Also, Naruto might inherit some special abilities from his supposed grandfathers, which is always exciting for fans to explore.