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.
The Last OG is purely fictional. It was made up by the writers to offer viewers an engaging and imaginative story rather than being rooted in real events.
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.
Well, without knowing the exact nature of the 'order of throne og glass novels', in many series, the order helps in understanding the character development. As the story progresses through the novels in order, we see how the characters grow, change, and interact with their changing environment. This could be similar for these novels too.