Another aspect of the plot could be that Naruto discovers that Lucifer has some grand plan for the ninja world and he has to stop it. Along the way, he uncovers secrets about his own origin and the true nature of the ninja world. He might have to face some powerful demons or dark forces that are allied with Lucifer. His friends from the ninja world might be initially hesitant to help him, but in the end, they come together to fight against the common threat.
The plot could also center around Naruto being an outcast in the ninja world because of his relation to Lucifer. People might fear him, but he tries to prove that he's not like his 'father'. He could go on a journey to find a way to sever the connection to Lucifer and fully embrace his ninja identity. This could lead to him facing many challenges and making new allies along the way.
Well, the plot could start with Harry finding out his true parentage. This would be a huge shock considering his normal 'muggle - born' or other normal origins in the original story. He might struggle with the new - found knowledge and the implications it has. Maybe he would have to deal with new powers that come with being Lucifer's son, and face opposition from both the wizarding world who see Lucifer as an evil entity and also from Lucifer's enemies in his own realm.
Perhaps it could be a story of redemption for Lucifer. Naruto, with his unwavering belief in the good of people, sees something in Lucifer that could be saved. He tries to convince Lucifer to turn away from his more evil tendencies. Along the way, Naruto has to face challenges in Lucifer's world, and Lucifer has to face his inner demons as Naruto encourages him to change.
Perhaps in this fanfiction, Naruto's connection to Lucifer is a secret kept by a few powerful beings. As he grows stronger, he starts to show signs of Lucifer - like abilities such as the ability to manipulate shadows in a more sinister way. This causes his friends to be both curious and a bit afraid of him. Naruto then has to figure out how to control these new powers and keep his relationships intact.
Well, it could be about Naruto having some sort of connection to Lucifer. Maybe he inherits some of Lucifer's powers and has to deal with the consequences. For example, he might struggle with the dark nature of those powers while still trying to protect his village.
Yes, there might be such a fanfiction. The plot could involve Harry discovering his true parentage and struggling with the implications. He might have to deal with new powers that come with being Lucifer's son, and face opposition from the wizarding world who fear his dark heritage. Maybe he would also have to make a choice between the path of good and the temptations of the dark side his father represents.
Perhaps the plot involves Naruto being summoned to Fem Lucifer's world. He then realizes that she needs training to deal with a new threat in her realm. So, he starts training her in various ninja arts.
One possible plot could be that Lucifer, bored with the underworld, decides to visit the Naruto universe. He could take on the form of a powerful ninja and start causing chaos, which draws the attention of Naruto and his friends. Naruto, seeing the evil in Lucifer's actions, tries to convince him to change his ways, leading to a series of battles and philosophical debates.
It could be about Naruto somehow ending up in Lucifer's world. Maybe he has to learn to deal with the new rules and powers there. Or perhaps Lucifer takes an interest in Naruto's ninja skills and they form an unlikely alliance.
Well, it could be a really wild plot. Maybe in this fanfic, Haymitch's son has some of Naruto's spunk and determination. He could be on a journey in the Naruto universe, learning ninjutsu and trying to make a name for himself. He might face challenges like Naruto did, such as dealing with powerful enemies and trying to protect his friends. And perhaps he has some unique abilities that come from his strange parentage.
One possible plot could be Naruto having unique water - based powers inherited from Amphitrite. Maybe he can communicate with sea creatures easily. For example, he could use dolphins to gather intelligence or whales to help in battles at sea. This would make him a very different kind of ninja compared to the regular ones in the Naruto universe.