Perhaps the fanfic is about Buu waking up and being confused by the events of the Cell Saga. He might not understand the conflict between the androids and the Z - fighters. So, he could start interacting with different characters in his own strange way, like befriending some of the minor characters or causing unexpected mayhem just because he doesn't know any better.
If we think about it, Naruto's Nine - Tails chakra mode and Fem Buu's raw power could merge in interesting ways. The Nine - Tails' chakra is already very powerful, and when combined with Fem Buu's regenerative and adaptable powers, it could result in a new form for Naruto. This new form might have the strength of the Nine - Tails along with Fem Buu's ability to change shape and withstand attacks better. Additionally, Fem Buu could use her shape - shifting to mimic some of Naruto's jutsu, making them more powerful or having a different effect.
One idea could be that Fem Buu ends up in the Naruto world and her unique abilities cause chaos. Naruto, being the hero, tries to understand her and figure out a way to send her back. Another plot could involve a team - up where Fem Buu and Naruto fight a common enemy that threatens both their worlds. Maybe there's a villain who wants to use Fem Buu's power for evil in the Naruto universe.
One idea could be exploring the Supreme Kai of Time's untold backstories. Maybe she had some secret training or a special encounter in the past that shaped her into the being she is in the DBZ universe.
Super Buu is definitely comical. His childish tantrums, odd behavior, and the way he reacts to situations often provide comic relief. However, it also depends on how you interpret his character and the context of the story.
I recommend the following novels to you:
1. [The Infinity of the Beginnings of Buu the Demonman]: The protagonist becomes Buu the Demonman and travels through many worlds, experiencing various adventure stories.
2. " Marvel's God-level Demon Man Buu ": The protagonist Chen Chen transmigrated to the Marvel Universe and obtained the ability of the Demon Man Buu. At the beginning, he obtained the Immortal Demon Body and began his devouring journey.
I hope you like my recommendation.
I recommend you two novels with Buu as the main character, both of which have been completed. The first book was Dragon Ball: The System Ran Away at the Beginning. The protagonist, Li Ming, used the Saiyan bloodline given by the system to launch a domineering path and defeat strong enemies such as Frisa, Sharu, and the Demon Buu. The novel was violent and full of exciting battles. The second book was " Marvel's God-level Demon Man Buu." The protagonist, Chen Chen, transmigrated to the Marvel Universe and possessed the soul of the Demon Man Buu, obtaining the ability of an immortal demon body. He continued to grow through his devouring ability and defeated powerful enemies one after another. Both novels had Buu as the main character, and the plot was compact and exciting.