It could be Kurama. If Naruto dies, Kurama's chakra might still be lingering. Kurama, having developed a bond with Naruto over the years, could use the last of his strength to perform a self - sacrificing revival. He could merge his remaining chakra with Naruto's body in a way that restores his life. This would be a very emotional moment as Kurama has always been a part of Naruto.
Kakashi could also be a main character. He has lost many people close to him, like his father, Obito, and Rin. Facing the death goddess, he could be in a moral dilemma. He might be tempted to use her power to change the past, but also realizes the consequences that could come with meddling with death. His internal struggle could be a central part of the fanfiction.
Maybe it's a transformed version of an existing Naruto character. For instance, Sasuke could potentially be turned into a death dealer in a dark alternate storyline. After all the pain and suffering he's been through, he might take on this role in a different way. Or it could be Orochimaru, who already has a rather dark and death - associated nature, perhaps evolving into a more extreme death dealer in this fanfiction.
It could be an unknown rogue ninja who has developed a unique fighting style based on surgical techniques. He might have been shunned by the ninja community for his unorthodox methods.
It could be Sasuke. Since they have a complex relationship in the original series, in the yaoi fanfiction, their relationship could take a different turn in the Forest of Death. They might have more intimate moments while facing the challenges there.
It could be an ancient shinobi who has mastered some kind of death - related jutsu and has ascended to a higher state of being. This shinobi might have been forgotten in the history of the ninja world.
The following are the recommendations for a few novels about the resurrection of the male protagonist: << The Hitman >>: This is a mystery detective and horror horror novel. The protagonist is reborn as a Hitman and fights against evil in the netherworld. This novel had a description of the netherworld. 2. [Pilgrimage: The story tells the story of the male protagonist, Yan Pei, resurrecting after his death on Singles 'Day.] These novels are all completed works and can satisfy your needs for resurrection novels.
If Naruto's parents were revived in fanfiction, the plot could change in many ways. For one, Naruto's character development might take a different turn. He could become more confident with his parents by his side. The power balance in the ninja world might also be affected. Enemies might think twice about attacking the Hidden Leaf with Minato and Kushina back. And Naruto could focus more on building a family and passing on his own legacy with his parents' guidance.
It could be a character who was once on the side of the light but was corrupted in some way and became Death's Knight. Maybe Neville Longbottom, who has always been underestimated. His transformation into Death's Knight could bring a whole new perspective to his character, as he battles his inner demons.
Kakashi could step up more as a mentor. He already has a connection with Naruto and could help him develop his skills further.
Sasuke could be responsible. Their relationship has always been complex. Maybe in this fanfiction, their rivalry escalates to a point where Sasuke accidentally kills Naruto during a fight at the Valley of the End.