First, decide on the world or character you want to crossover with Kizaru. For example, if it's the Star Wars universe, think about how Kizaru's light - based attacks could be compared to lightsabers. Then, come up with a plot. Maybe Kizaru is sent to a different galaxy and has to find his way back home while getting involved in the Galactic Civil War.
In fanfics, Admiral Kizaru's power can be highly exaggerated. His Pika Pika no Mi ability, which allows him to move at the speed of light, can be made even more potent. Writers might make him capable of creating stronger light - based attacks or having better control over his speed. For example, he could be shown to split into multiple light - clones more easily and use them in more complex battle strategies.
Another theme is loyalty. Kizaru is often part of a group, and fanfictions explore his loyalty to his comrades. There could be stories where he has to choose between following orders and doing what he believes is right for his friends. This creates interesting moral dilemmas within the story.
Overall, Trigun Stampede adheres closely to the manga. Some minor details might differ for the sake of the adaptation's flow and visual presentation, but the core remains the same.
It's quite accurate. The anime version of Trigun Stampede mostly adheres to the manga, with just a few minor differences that don't significantly impact the main plot or character development.
I think it does to a large extent. There might be some minor tweaks here and there, but the core plot and characters are pretty much in line with the manga.
Trigun Stampede takes some liberties compared to the manga. It changes certain story elements and character traits to offer a fresh perspective, but this might not please all manga purists.