Obviously, Naruto and fem Pain are the main characters. Naruto, with his strong will and determination to protect his friends and the village. And fem Pain, who might have a different take on the Akatsuki's goals compared to the original Pain in the Naruto series.
One interesting plot could be a story where fem Pain has a change of heart due to Naruto's unwavering belief in peace. Maybe she starts to question the path of destruction she was once on and joins Naruto in his quest to bring harmony to the ninja world.
One great fem Naruto x fem Kyuubi fanfiction could be one that focuses on their unique bond. It might explore how they interact in a world where Naruto is female and the Kyuubi also takes a female form. For example, it could show them teaming up against common enemies and how their combined powers are different from the original story.
There's also 'The Bond of Enemies'. In this fanfic, Pain, after his defeat, is given a second chance at life by Naruto. It shows a really interesting dynamic as Pain tries to figure out his new place in the world with Naruto's influence. It has some great action scenes and emotional moments.
One great Naruto x fem vampire fanfiction is 'The Vampire in Konoha'. It has an interesting plot where the female vampire character has unique powers and her relationship with Naruto develops in a really engaging way. They face many challenges together, both from the shinobi world and the vampire lore within the story.
In a Naruto x fem wolf goddess x fem kyuubi fanfiction, the fem wolf goddess could represent a more spiritual or wild aspect. She might introduce Naruto to a different side of the ninja world, one that is more in tune with the natural order. The fem kyuubi, on the other hand, could have a more fiery and powerful personality. The story could revolve around Naruto trying to balance the influence of both characters while also dealing with his own growth as a ninja.
One possible plot could be that the female werewolf is an outcast in her own world. Naruto, with his kind heart, befriends her. Meanwhile, the fem Kyuubi has a connection to Naruto due to the Kyuubi within him. They all come together when a common enemy threatens the Hidden Leaf. The werewolf could use her unique abilities, like enhanced strength and speed, to help Naruto in battles, while the fem Kyuubi might offer her own brand of power, perhaps related to chakra manipulation. As they fight side by side, a deep bond forms between Naruto and the two female characters.
A prevalent theme is also acceptance. Naruto has to accept these two unique entities into his life, and they in turn have to accept him and each other. It's about how different beings from different backgrounds can come together. And there's often the theme of adventure as they go on various quests or face threats in the Naruto world.
Jiraiya could be a great addition. Since he was Pain's teacher, his presence could add a lot of depth to the story. He could offer insights into Pain's past and also help Naruto understand Pain better.
A popular one could be Amaterasu, the sun goddess from Japanese mythology. Since Naruto's world has some roots in Japanese culture, it makes sense for her to be included. She might bring her divine powers to Naruto's world and interact with Naruto in unique ways.