Perhaps they would start off as strangers and then become friends through a shared struggle. For example, they might both be targeted by a new and dangerous enemy. As they fight side by side, they start to understand each other's motives and values. Giorno might learn from Joseph's years of combat experience, while Joseph could be inspired by Giorno's fresh perspective and determination. They could also have some humorous exchanges, with Joseph making jokes and Giorno having a more deadpan reaction.
I don't think so. Strength can be defined in multiple ways, and in the vast landscape of fiction, there are numerous characters who could be considered stronger than Giorno based on different factors.
One great 'female Giorno fanfic' could be 'A Different Perspective'. It delves into how a female Giorno might handle the complex situations in the JoJo's universe. It shows her unique approach to leadership and her relationships with other characters. Another one is 'Giorno's New Path' which explores a female Giorno's journey in an alternate timeline. These fanfics often add new dimensions to the original story by changing the gender of the main character.
Sukuna does die in the manga. The way it happens is quite dramatic and ties in with many other elements of the story, adding depth and tension to the overall narrative.
Yes, there might be. There are numerous fanfiction platforms out there where such crossovers could exist. You could start by checking popular fanfiction websites like Archive of Our Own or FanFiction.net.
No. Ryomen Sukuna is a fictional character from Japanese mythology and modern manga/anime. He doesn't have a basis in a true historical event or person.
Nope. Ryomen Sukuna has no basis in reality. It's a product of the creative minds of the writers and illustrators who designed a captivating fictional character for the enjoyment of the audience.