I haven't heard about the Chamar Dev ghost story before. It might be a regional or cultural - specific story that is not widely known. Maybe it's passed down in a particular community.
Not having knowledge of the Chamar Dev ghost story means I can't accurately name the key elements. But if we think about typical ghost stories, there could be things like the appearance of the ghost (is Chamar Dev a menacing or sad - looking figure?), any special powers or abilities the ghost has, and how the local people react to the presence of this ghost. Maybe there are local superstitions associated with Chamar Dev that are important elements of the story as well.
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 scene of Sukuna's death in the manga is a climactic moment. It's filled with action and drama, as various powers and tactics are employed to bring him down. The build-up to this point is full of tension.