One possible plot could be that Bulma and Chichi team up for a scientific - martial arts tournament. Bulma uses her intelligence to create unique gadgets for Chichi to use in the combat part of the tournament. This brings them closer as they train together and face various opponents.
It could be Frieza. He might be interested in Bulma's technology for his own evil purposes and sees Chichi as a threat because of her connection to the powerful Z - Fighters. So he tries to stop their partnership and steal Bulma's inventions.
One common theme is friendship. Since they are both important female characters in the Dragon Ball universe, fanfics often explore how they become friends and support each other. For example, they might team up to deal with some threats in the story.
Well, if they fuse, the new character would likely have Bulma's inquisitive nature. They would be constantly curious about new things, especially in the realm of science and technology. At the same time, they would also possess Chichi's determination. So when facing challenges, they would be very persistent.
In a fanfic, the Bulma - Chichi fusion could be part of a tournament arc. They enter the tournament fused and shock everyone with their abilities. Their opponents underestimate them at first, thinking it's some kind of strange trick. But as the battles progress, they show that their fusion is not only powerful but also has a deep understanding of both martial arts and strategic thinking.
Well, the plot could involve them fusing due to some kind of magical or technological accident. Maybe they are trying to defeat a powerful enemy together and their combined energy causes them to fuse. They could then have a new form with combined powers and a unique personality that is a blend of their own.
You can start by looking on popular fanfiction websites like FanFiction.net or Archive of Our Own. These platforms usually have a wide range of fan - created content, including stories about Bulma and Chichi.
One good Bulma x Chichi fanfiction could be about them going on a shopping spree together in different dimensions. They could discover unique items and bond over their shared love for fashion and new technology that Bulma is into.
It could also be due to the way the fanfic writers handle their characters. If they write Bulma as a prideful character and Chichi as someone who challenges that pride, either directly or indirectly, Bulma might be written as hating Chichi. Fanfic often takes creative liberties and this could be one of the results.
One interesting story could be about Bulma and Chichi teaming up to save the Dragon Ball world from a new, unexpected threat. They use their unique skills and knowledge, Bulma with her technological genius and Chichi with her martial arts training and motherly determination.