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 action and battles. For example, in 'Fullmetal Alchemist: Brotherhood', the alchemical battles are intense and exciting. And the unique settings. Take 'Sailor Moon', the magical girl setting in a modern - day city with other - worldly threats is very captivating. Moreover, the friendships and alliances formed during the adventures, like in 'Fairy Tail', add emotional depth to the story.
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.