Majin Buu was created by the wizard Bibidi. Bibidi was an evil being who made Majin Buu as a weapon of destruction. Majin Buu was originally a pure and innocent being, but Bibidi's evil influence turned him into a rampaging monster.
One possible fanfiction could involve Naruto being transported to the Dragon Ball universe where he meets Female Majin Buu. Maybe they start as adversaries at first. Naruto, with his ninja skills, tries to fight her. But then they realize they have some common ground in their love for food. And they could end up teaming up against a greater threat in the Dragon Ball world.
In the fanfic, Bardock might be filled with pride. He could be thinking how his son has grown into such a powerful warrior. After all, Goku has come a long way from being a little Saiyan baby sent to Earth. Watching Goku fight Buu, Bardock might see all the potential he always knew Goku had, finally being fully unleashed.
In the fanfiction, Bardock might be in a state of awe. Goku's fight against Buu is no small feat. Bardock would likely note Goku's ability to keep getting back up, no matter how hard Buu hits him. He might also be thinking about the power levels involved. In his time, the power levels he knew were much lower. Now, seeing Goku take on a foe as powerful as Buu, he'd realize just how much the Saiyan race has evolved, especially with Goku as a prime example.
One common theme could be redemption. Just like the original Majin Buu, a female version might go through a journey of changing from a more menacing or chaotic being to a more benevolent one. Another theme could be friendship, perhaps forming unexpected alliances with other Dragon Ball characters.
I found a fanfiction that focuses on Female Majin Buu's growth as a character with Gohan as her mentor. It's interesting because it delves into how she adapts to life on Earth with Gohan's guidance. The story also has some really cool action scenes where Gohan and Female Majin Buu train together and then use their combined skills to take on villains.
Well, it could be about Naruto having the unique powers of Majin Buu. Maybe he'd have the ability to regenerate like Buu. And his personality might change a bit, being more unpredictable. He could use Buu's techniques in battles against his enemies in the Naruto world.
In a fanfiction where Naruto fuses with Majin Buu, there could be some really wild power combinations. Naruto's chakra and Buu's unique abilities like regeneration and absorption might create a super - powerful being. For example, Naruto could potentially use his Rasengan with Buu's stretchy body to create new and unpredictable attacks.
I'm not sure about specific 'female majin buu fanfic' offhand. You could try searching on fanfiction websites like Archive of Our Own or FanFiction.net. They usually have a wide variety of fan - created works related to different characters, including Majin Buu.