One common theme is the power struggle. Since Kyuubi and Shukaku are powerful entities in Naruto, when they are in female forms in fanfiction, their power and how they interact with other characters in terms of power dynamics can be a big theme. For example, they might have to fight against villains who want to use their power.
One possible fanfiction could be about the female Kyuubi and female Shukaku forming an unlikely alliance. Maybe they team up to help Gaara and Naruto in a battle against a common enemy from the FF7 universe. It could explore how their unique powers interact in this crossover scenario.
A common theme is acceptance. The fem shukaku, being different, might struggle with acceptance in the ninja world. Naruto, with his open - hearted nature, helps her find her place. Also, adventure is a theme. They could go on quests together, exploring new parts of the Naruto world and facing enemies along the way. For example, they might discover ancient secrets related to the Shukaku's origin.
I would recommend 'Naruto and Shukaku: A New Alliance'. In this fanfiction, it focuses on a scenario where Naruto and Shukaku have to team up against a new, powerful enemy. It has a lot of action scenes and also some really interesting character development for both of them.
One popular theme is the relationship between Gaara and Fem Shukaku. It could explore how they interact in a world where Shukaku has a female form. Another theme might be the power dynamics. Since Shukaku is a powerful entity, in a fanfiction, it could show how Fem Shukaku's power affects Gaara's life and his role in the village. Also, themes of friendship and mutual understanding often come up. As Gaara has had a difficult past, Fem Shukaku could potentially be a source of newfound support and a different kind of connection for him.
The other Jinchuurikis could be potential allies. They understand the struggles and the power that comes with having a tailed beast inside them. For example, Killer Bee, who has a good relationship with his tailed beast, could share his insights on how to better co - exist with Shukaku. Tsunade might also be an ally, as she is a powerful Hokage who could offer protection and resources to the Jinchuuriki.
The appeal could lie in the novelty. Since Naruto is male in the original, making Naruto female changes the whole dynamic. The lemon part might add a bit of a romantic or sensual allure for some readers who enjoy that aspect in fanfiction.
A lot of such fanfictions might deviate from the canon quite a bit. With 'fem Naruto', the power dynamics and emotional connections with Sakura could be reimagined. Some may focus on their friendship evolving into something more romantic, while others might explore more complex storylines involving other characters in the Naruto universe as well.
In many lemon fanfictions, Naruto being the master of fem Kyuubi is a concept that can lead to a variety of plot developments. This relationship can be used to explore different aspects of the Naruto universe that weren't fully explored in the original series. For example, it could be used to show how Naruto's leadership skills or his unique bond with the Kyuubi might change if the Kyuubi was female. It can also introduce new challenges and adventures for Naruto, as he has to deal with a fem Kyuubi who might have different characteristics and motives compared to the traditional Kyuubi. Additionally, the lemon aspect might add a layer of romantic or sexual tension to their relationship, which can be a major driving force for the plot in some fanfictions.
A fem Naruto in a lemon fanfiction with Yugao could be really interesting. Since Naruto is usually male in the original, making the character female changes the dynamics. Yugao, who has her own backstory in Naruto, might be drawn to this new fem Naruto in a way that's different from what we expect. The fanfic could show how they overcome any differences or obstacles in their relationship, and the lemon aspect could add a layer of passion and vulnerability to their connection.