Adult fan fiction often involves creating fictional stories based on existing fandoms (like movies, books, shows) but may include adult - themed content. However, 'quien' might be a misspelling or something specific within a certain context that I'm not sure about. It could potentially refer to who the characters are in this adult fan fiction, but without more context, it's hard to be more precise.
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.
Historical fiction is a genre of literature that combines fictional elements with historical events, settings, or characters. For example, a novel might be set during the American Civil War and feature real battles and historical figures, but also include made - up characters and fictional sub - plots.
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.