One key element is Naruto's relationship with the tailed beasts. In these fanfictions, it's often explored more deeply, like how he communicates with them on a spiritual level. Another element is his use of sage mode combined with the tailed beast powers, which usually leads to some epic battles.
One great tailed sage Naruto fanfiction is 'Naruto: The Sage of the Tailed Beasts'. It delves deep into Naruto's connection with the tailed beasts and his journey to master sage mode while also exploring new relationships. Another is 'Tailed Sage Naruto: Ascension' which has some exciting battles where Naruto uses his tailed sage powers in unique ways.
I'm not sure specifically as there could be many different takes on it. It might be about a character who has a special connection or power related to the tailed beasts, like being able to control them in unique ways or having some sort of prophetic knowledge about them.
Often, the main character would be the Sage of Tailed Beasts. They would be the central figure driving the story forward. There could also be other important characters such as the jinchuriki of the tailed beasts. For example, if the story is about protecting the tailed beasts, the jinchuriki would play a crucial role. And of course, there could be antagonists, perhaps villains who want to capture the tailed beasts for their own evil purposes.
The 0 - Tailed Jirakin might possess the ability to manipulate space - time on a small scale. It could create mini - rifts or pockets of distorted space - time around it. Enemies getting too close could find themselves in a time - loop of sorts, repeating a small moment over and over until they break free, which would be extremely difficult as they'd be disoriented and unable to effectively attack the Jirakin.
In some fanfictions, the 9 - Tailed Wolf might take Naruto on a spiritual journey. They could visit different realms that are connected to the chakra of the tailed beasts. During this journey, Naruto could learn about the balance of nature in terms of chakra and how to better control his own. He might also meet other powerful beings in these realms who could either befriend or oppose him, adding more layers of adventure to the story.
In Naruto ten - tailed fanfiction, often the storylines are quite imaginative. The ten - tails is such a powerful and mysterious entity in the Naruto universe. Fanfictions might focus on the origin of the ten - tails in a different light. Maybe there are hidden secrets about it that were not explored in the original series. And it's always interesting to see how the characters' relationships change due to the presence of the ten - tails.
The story could take a different turn in terms of alliances. Nations that were previously at odds might come together to deal with the 0 - Tailed Jirakin threat. Also, new ninja with unique abilities might emerge to combat this new threat. For example, some ninja could develop jutsu specifically designed to counter the powers of the 0 - Tailed Jirakin. And the relationship between humans and tailed beasts could be re - examined as this new entity challenges the existing understanding of tailed beasts.
One interesting storyline could be about the tailed beasts forming an alliance outside of the control of humans. They might work together to protect their own kind and the world in a different way than the shinobi. For example, they could create their own hidden land where all chakra - based creatures are welcome.
In this fanfiction, Naruto could control all the tailed beasts because of his unique chakra nature. His chakra is very special and has a high compatibility with the tailed beasts' chakra. Also, his experiences with Kurama might have given him insights on how to handle other tailed beasts. He probably communicates with them on a spiritual level and convinces them to work together with him.