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.
One interesting fuga melodies of steel fanfiction could be about the characters' backstories. For example, a story that delves deep into the past of a main character, exploring how they came to be in the world of Fuga Melodies of Steel. It could show their early training, the people they met along the way, and the events that shaped their personalities.
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.
First, know the source material well. Understand the characters, their personalities, and the world they live in. For example, if you're writing about a particular character in Fuga Melodies of Steel, you should be aware of their abilities, their goals, and their relationships with other characters.
In the manga, Sukuna doesn't possess all 20 fingers. There are specific story arcs and events where his finger count changes based on the plot developments.
In the manga, Sukuna does acquire all his fingers over the course of the story. This is a significant plot development that has major implications for the storyline and character dynamics.