One key theme is friendship. Despite their clans' differences, fem Madara and fem Hashirama can form a strong bond of friendship. Another theme is breaking gender stereotypes. In the Naruto world, they are powerful female characters who don't conform to the traditional roles. Also, the theme of unity is important. Their relationship can symbolize the unity that could have been between the Uchiha and Senju clans.
It could be an ancient evil spirit that was sealed away by Fem Hashirama in the past. Now that she has resurfaced in the Naruto - era, the spirit is also awakened. This spirit wants to destroy the world that Fem Hashirama once protected and Naruto, being the hero of his time, stands in its way along with Fem Hashirama.
Well, perhaps Fem Hashirama is reincarnated in a way and she has no memory of her past. Naruto finds her and realizes who she is. He then takes it upon himself to help her regain her memories. Along the way, they go on various adventures, meet old friends and foes of Hashirama's time. Their relationship blossoms as they work towards the goal of restoring her memories and she also becomes a powerful ally to Naruto in his fight against the remaining threats in his world.
One possible aspect of Hashirama x Fem Madara fanfiction could be exploring their different ideologies. Hashirama was more inclined towards peace and building a village where everyone could co - exist. A fem Madara might add an interesting dynamic as she could bring a different perspective. Maybe she would be more empathetic in this version, which could lead to a different series of events in the story compared to the original male Madara's more aggressive stance towards achieving his goals.
Power and its implications are common themes. Fem Hashirama may have different ways of using and controlling power compared to the male version. Her power could be seen as a threat or an asset in the Naruto world. And there's also the theme of adaptation. Both Naruto and Fem Hashirama have to adapt to each other's presence and the changes that come with it in the story, whether it's in combat, in the village, or in their personal relationships.
At first, their relationship might be one of confusion. Hashirama has no idea who this strange girl (Fem Naruto) is. But as Fem Naruto shows her strength and knowledge from the future, Hashirama begins to respect her. He might see her as a valuable ally in his goal of creating a unified village.
One common theme is the struggle against clan differences. Since their clans are often in conflict in the original Naruto lore, in fanfiction this becomes a major obstacle for their relationship. For example, they might have to keep their love a secret to avoid causing more strife between the clans.
One common theme is the idea of forbidden love. Since Madara and Hashirama are from rival clans, their relationship goes against the norms of their society. Another theme is the power of love to change destinies. Their love could potentially change the fate of the ninja world. For example, it could prevent future wars between the clans.
One great 'madara x fem hashirama fanfic' could be 'The Bond Beyond the Clans'. It delves into a world where Madara and a female Hashirama form an unexpected bond early on. Their relationship is explored in the context of the turbulent times of the ninja clans. Another one might be 'A Different Path' which shows how their relationship could have changed the course of the entire ninja world's history. It has some really interesting character interactions.
Reconciliation is also a theme. Given the historical enmity between their clans, a lot of fanfics focus on how fem Madara and Hashirama work towards reconciling their clans through their relationship. They become a symbol of hope for a united future, and this theme adds a lot of depth to the stories.