If Goku was a Saiyan in a fanfic, it could explore different aspects of his heritage and potential. Maybe there would be hidden powers or ancestral ties that come into play.
If Goku married a Saiyan in a fanfiction, it might bring new challenges and adventures. Maybe there'd be family feuds or combined efforts to protect their kind. It really depends on how the author envisions their relationship and the subsequent story arcs.
One trait is his love for combat. Goku would constantly seek out strong opponents to test his skills. Another is his Saiyan pride. He might not back down from a challenge even if it seems impossible. Also, his Saiyan appetite. He would probably eat huge amounts of food to fuel his Saiyan - level energy.
Well, if Goku was the legendary Super Saiyan in fanfiction, it could completely change the power dynamics in the Dragon Ball universe. There might be new enemies or allies formed based on this twist.
She could be an original character created by the fanfiction writer. Maybe she has some special abilities like being able to control a unique form of energy that Goku has never seen before.
One common theme is power growth. Just like in the original Dragon Ball series, in these fanfictions, both Goku and the oc saiyan usually strive to become stronger. They might train together or learn from each other's techniques.
Love and family are also common themes. The story could show how Goku and his Saiyan wife build a family, deal with the ups and downs of married life, and support each other through various challenges. For example, they might face an enemy that targets their family, and they have to work together to protect their loved ones. Additionally, cultural differences between Earth and Saiyan cultures could be explored, such as different marriage traditions or ways of raising children.
If Goku were the legendary Super Saiyan in fanfic, it could lead to new story arcs and challenges. Maybe he'd face even more powerful villains or have to deal with the weight of his immense power.