It could be an original character created specifically for the fanfiction. Maybe it's a being from a different dimension that somehow ended up in the Naruto universe. It might have some special powers or a tragic backstory that led to it being in conflict with Naruto.
He could also gain this power as a result of a unique encounter. Let's say he meets a mysterious sage who sees his potential and enhances his abilities. This sage could use some kind of magic or chakra - based technique to give Naruto the boost he needs to send the fallen angel to the moon. It could be related to unlocking a deeper level of his Nine - Tails chakra too.
😋I recommend " The Goddess Project " to you. This sci-fi space-futuristic novel is similar to the two novels you mentioned. The protagonist is also a somewhat " fallen " female character. She has experienced many dangers and challenges in the online game world. The life-and-death battle between the vampire prince and the wolf is also a big attraction. I'll recommend you to take a look. I hope you like it.😗~
Maybe Naruto, as a character with his own set of values and a specific world view from his original story, finds the concept of fallen angel fanfiction too far from what he represents. His world is about ninja values like loyalty, hard work, and friendship, and fallen angels might seem out of place in that context.
He could be a new type of threat or ally in the DxD world. Since Naruto has such powerful abilities, the fallen angels might see him as a potential weapon or a hindrance to their plans.
Maybe Naruto, as a fallen angel, has lost his powers and is trying to regain them while still in the Ninja world. He could be facing discrimination from both the angels (if they exist in the story's universe) and the Ninja who see him as something different.
It really depends on the specific fanfiction. However, Naruto himself is likely to be one of the main characters as it's set in the Naruto universe. There could also be an original character created as the fallen angel. This character would be central to the story, driving the plot with their actions and interactions with the other Naruto characters.
Well, one possible plot could be that Naruto is cursed by some dark force and turns into a fallen angel. He might struggle with his new identity, as it goes against his usual positive and energetic self. His friends in Konoha could initially be scared or confused by his transformation, and Naruto has to prove that he's still the same person deep down while also dealing with the new powers and temptations that come with being a fallen angel.
I recommend the following two novels to you:
1. "I Am an Angel in Women's Power": The protagonist Ning Yu found herself with wings after her rebirth. She was an angel. The novel involved science fiction and interstellar civilization.
2. "Blood Clan Feelings: The Demon King Dotes on His Wife Too Much": One of the main characters is a fallen angel. The novel is a mix of fantasy and interracial romance.
I hope you like this fairy's recommendation. Muah ~😗
There were several novels about fallen angels that were recommended: Fallen Angel, Fallen Angel 2: Trial, Fallen Angel 3: Fallen Angel, Angel's Dream, Paradise Lost, Legend of the Fallen Angel, Contract and Empress, Mad God, Fallen Blood Angel, In My Name, Fallen Wings, God's Game, Angel of the Moon, Fallen Angels, Familiar: Starting Contract with Fallen Angel, Doomsday Random Chicken Dinner System, Online Game Resurrection, Holy Dragon Mage, Lucifer's Wings, Lucifer's Game. These novels cover different styles and topics. I hope you can choose the ones that suit your interests.