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.
I'm not familiar with the author of this novel. It could be an indie author or someone relatively new in the literary world. Maybe it's a self - published work, which would make it even more difficult to know the author without some research.
The 'Woman in the White Kimono' could potentially be a character - centered novel. The white kimono might be a symbol. Maybe it's a love story where the white kimono has some significance in the relationship, like it was a gift or something she wore on a special occasion that led to certain events in the story. Or it could be about a woman's journey in a particular culture where the white kimono is a traditional garment, and her experiences are explored through that cultural lens.
One idea could be that Naruto wears a kimono for a special diplomatic event in the Hidden Leaf. It could be a traditional kimono passed down in his family, and while wearing it, he has to learn the proper etiquette associated with it, which leads to some humorous situations as he's not used to such formality.
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.