I'm not sure specifically as I haven't read that exact fanfic. But generally, it might be about a character named Naruto Namikaze in the Kumo (presumably Kumogakure, the Village Hidden in the Clouds) setting. It could involve his adventures, relationships, or his role in the village's affairs.
One good 'Prodigal Namikaze Naruto Fanfic' could be 'The Prodigal Namikaze's Return'. It has an interesting plot where Naruto discovers his Namikaze heritage in a very unexpected way. The story does a great job of showing Naruto's growth as he deals with this newfound knowledge.
I'm not entirely sure as the title is a bit unclear. It could be a fanfiction where Naruto doesn't like or is not related to the Namikaze clan in some way. Maybe it's a story that goes against the typical ideas of Naruto having a strong connection to his Namikaze heritage.
One popular 'namikaze naruto fanfic' is 'The Namikaze Heir'. It has an interesting plot where Naruto discovers his true heritage as a Namikaze earlier on and it changes the course of the story in unique ways.
The 'Prodigal Namikaze Naruto Fanfic' is special because it gives a new twist to Naruto's story. By highlighting his Namikaze heritage, it explores a different side of his character. He's not just the underdog with the Nine - Tails anymore.
Well, Naruto is of course a main character. Since it's a 'namikaze naruto fanfic', his connection to the Namikaze clan is often explored, like his relationship with his father Minato. Other common main characters can be Sasuke. Their rivalry can be presented in a new context because of Naruto's Namikaze heritage.
Obviously Naruto himself is a very important character as he is part of the Namikaze Clan. His father Minato is also crucial as he represents the previous generation of the clan. Kushina, Naruto's mother, could also be important as she was closely related to the Namikaze Clan through her marriage to Minato.
Well, 'naruto namikaze fanfic' is popular for multiple reasons. Firstly, Naruto is a very popular anime, and Namikaze is an important character in the Naruto universe. Fans want to see different interpretations of his story. Secondly, it gives the writers a chance to fill in the gaps in the original story. For example, his relationships, his unfulfilled dreams and so on. Thirdly, it allows fans to create their own versions of what could have been, like how Namikaze could have influenced Naruto more directly if he had been alive. All these factors contribute to its popularity.
One great 'Naruto Uzumaki Namikaze Uchiha Fanfic' is 'The Legacy of Uzumaki Namikaze'. It combines the unique lineages of Uzumaki and Namikaze in Naruto's character in a really interesting way. It delves deep into how Naruto, with these combined heritages, could change the shinobi world. The story has amazing character development and some really cool fight scenes that are well - written.
You could try searching on popular fanfic websites like FanFiction.net or Archive of Our Own (AO3). They have a large collection of Naruto - related fanfics and there's a good chance you'll find the 'naruto namikaze of kumo fanfic' there.