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.
Well, in fanfiction, if Goku Black fuses with Goku, it could result in a super powerful being. Their combined powers might create a new form with an extremely high power level. This new entity could have a mix of Goku Black's dark and devious nature with Goku's pure-hearted heroism, leading to an internal struggle within the fused form.
Erza would also be a good pairing. She is a very disciplined and strong - willed character. Goku could learn from her discipline, and she could learn from Goku's carefree yet determined attitude. They could fight side by side in battles and protect each other.
If Goku Black fuses with Goku in fanfiction, the story would progress in a complex way. The fused form might go on a journey to understand itself. Since it has two very different personalities combined, it would face a lot of internal conflict. This could be used to explore themes like identity and the struggle between good and evil. Externally, the fused Goku could attract new enemies who see it as a threat to their power or plans.
In the manga, Goku has experienced death multiple times. However, his death is often a part of the narrative and doesn't mean the end for him. Resurrection and comebacks are common in his storyline.
Archive of Our Own (AO3) is also a great place to look. The site has a very user - friendly search function. Just type in 'Goku and Serena love' and it should pull up relevant stories. It also has a tagging system which makes it easier to find exactly what you're looking for.
Finding a 'goku pen light novel' can be a challenge. If it's an official work, it might be available in specialized anime or manga stores that also carry light novels. But if it's a non - official, fan - made piece, it could be floating around on various online communities dedicated to Dragon Ball. You may need to do some deep - diving into fan - created content platforms or ask in relevant social media groups focused on Dragon Ball or light novels. Just remember to respect any copyright laws when looking for such works.