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.
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.
" The Perfect World: Heaven's Slicing " was a fantasy novel. The author was always sleeping. The novel told the story of the protagonist Shi Tian drifting in the void and accidentally obtaining an opportunity. He accompanied a desolate battle that had dominated the world for thousands of years, salvaging his regrets and stepping into the peak. We have no way of knowing the specific plot and plot development of the novel.
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.