Well, Vegeta would be a likely character. He might be initially suspicious of the female Goku. Maybe he thinks she's a threat or just can't believe there's another Goku - like being. He could be there to add some comical moments as he tries to understand the situation.
In general, it's a bit of a toss-up. The strength of Manga Goku and Anime Goku can vary depending on the specific arcs and battles. Sometimes, it might seem like one is stronger in a particular situation, but that could change in another.
Another possible main character could be the villain that forces the two Gokus to meet. This villain could be a new, super - powerful threat that the two Gokus need to deal with. Their meeting becomes a crucial part of the story to defeat this powerful foe.
An example of a continuation of the necklace was as follows:
When the protagonist of the maupassant bought the necklace in the mall, he did not know that there was a terrible story behind the necklace.
A few days later, his wife found the necklace and felt uneasy. She confessed the secret behind the necklace. He was shocked and sad because he had always thought that the necklace was just an ordinary gift, but he had never thought that it would cause him so much pain.
His wife passed away very quickly, leaving behind a heart-wrenching maupassant. He felt that he had lost everything, the most important thing in his life.
However, he did not give up. He decided to find out the truth about the necklace and uncover the secret behind it. He spent a lot of time and energy investigating every detail and finally found out that the necklace was the murderer.
It turned out that the maker of the necklace was a wealthy businessman who used his wealth and status to deceive his wife and put her in danger. He planned to use the necklace to murder his wife, but because his plan failed, the necklace was accidentally discovered by Maupassant.
He realized that he had lost everything, but he had also become stronger and braver through this experience. He decided to pursue the legal responsibility of the murderer and return the necklace to his wife's family. He missed his wife dearly but also realized that the most important things in life were freedom and justice.
A Goku and Goku Black fusion in fanfiction could be really exciting. The fusion would inherit Goku's love for fighting and getting stronger, but also Goku Black's ambition. Their combined ki could be a new type of energy that no one has ever seen before. This new fused form might also have new transformations or abilities. For example, it could combine Goku's Super Saiyan forms with Goku Black's Rose form in unexpected ways. It could change the power balance in the Dragon Ball world and open up all sorts of new storylines, like teaming up with other characters to take on new threats or even having internal struggles between the two personalities within the fusion.
Goku could escape by overpowering Broly. He might tap into his Super Saiyan forms, like going into Super Saiyan Blue or even Ultra Instinct if he's pushed far enough. His sheer power and fighting skills could allow him to break free from whatever restraints Broly has put on him.
There could also be a moment of self - discovery for both of them. Goku might see his past self in Kid Goku and realize how far he has come, while Kid Goku could get a glimpse of his future potential through meeting his adult self. They could share stories about their friends and enemies, like how Goku could talk about Vegeta and Frieza to Kid Goku, and Kid Goku could tell Goku about his early battles with the Red Ribbon Army.
It could be insanely powerful. Goku already has incredible power levels, and Goku Black is no slouch either. When they fuse, it's like combining two nuclear reactors. Their power could be so great that they could effortlessly destroy planets just by flexing their newfound power. They might be able to reach Super Saiyan forms that are far beyond what we've seen in the official series, with power levels that are basically off the scale.