It could be a female Namekian. Since Namekians are also very strong and have their own unique culture, a female Namekian could catch Goku's eye. They might bond over their mutual respect for life and their experiences with fighting powerful foes.
In a Goku Black - Justice League fanfiction, it's possible that Goku Black would initially be seen as a threat. But if there was some sort of deal or situation that made him side with the League, he could add a whole new level of power. His fighting style, which is very different from the traditional Justice League members, could make for some exciting battle scenes. He might even teach the League some new combat techniques.
Goku could teach Naruto how to fight without relying too much on ninjutsu. Goku mainly uses his physical strength, speed, and ki in combat. Naruto could learn to better use his own physical abilities, like hand - to - hand combat and quick dodges, which would make him a more well - rounded fighter.
If Goku travels back in time, his relationship with Bulma could be very different. In the past, she was more of a guide to him. But if he goes back with his current knowledge and power, he could become more of a protector for her. He might also be able to prevent some of the dangerous situations she got into in the original story.
One idea could be a crossover with the Naruto universe. Goku with his Ultra Instinct could face off against Naruto in his strongest form. They might start as rivals but then realize they have a common enemy and team up. The story could explore how their different fighting styles and powers interact.
Maybe Goku accidentally saves a female alien during one of his adventures. She is from a race with unique powers. She becomes intrigued by Goku's strength and simplicity. As she stays around to learn more about Earth and Goku, they start to fall in love. Their relationship could be tested by the fact that she has responsibilities in her own world.
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 the second season of the celebratory year, the second prince threatened Fan Xian with the safety of Fei Jie, Fan Sizhe, and the Teng family's orphan, forcing him to bow to him. Fan Xian's predicament in Baoyue Brothel and the crisis of the imperial examinations were all traps set by the Second Prince. After Fan Xian and Lin Wan 'er got married, he took over the palace treasury and found that it was heavily in debt. He rejected the help of the head shopkeeper of Qingyu Hall and decided to resolve the palace treasury crisis with his own strength. Fan Xian made an appointment with the merchants in the city to gather at Cang Mountain. They raised more than 20 million taels of silver by selling the treasury debt, solving the problem of the palace treasury being empty. However, the Qing Emperor had suffered three assassination attempts at Xuankong Temple. Fan Xian's rescue had resulted in his martial arts being completely crippled. Faced with the increase in danger and pressure, Fan Xian had no other choice. He had to go to Jiangnan with this body and challenge the enormous power and established rules of the game to take back the palace treasury.