Well, one possibility is that Naruto, as the Angel of Death, is sent to the ninja world to end the cycle of violence. He might start by targeting those who have caused great harm, like powerful villains. But he could also face moral dilemmas when it comes to people he once knew and cared about. For example, he might have to decide whether to spare a former friend who has turned to the dark side but still has some good in them.
The plot could involve Naruto being an Angel of Death who is misunderstood. People in the ninja world see him as a threat and try to stop him. However, Naruto is actually trying to bring about a new era of peace. He believes that by eliminating those who are a constant source of conflict, he can create a world where everyone can live in harmony. He may also have some special powers related to death, like being able to resurrect those who he deems worthy, but only after they have passed through a kind of purification process.
Perhaps in this fanfiction, Naruto as the Angel of Death has the power to see the true nature of people's souls. He uses this ability to judge whether they should live or die. He could be on a mission to cleanse the ninja world of corruption. So he would go around to different villages, starting with Konoha. He might find that some of the elders who seem noble on the surface are actually full of greed and self - interest, and he has to deal with them accordingly.
In the 'naruto is an angel fanfiction', it could be that Naruto's angel form is a result of some ancient curse or blessing. His friends might be initially shocked but then come to rely on his newfound angelic abilities. He could use his powers to purify the darkness that lurks in the hearts of some of the villains in the Naruto universe, like Orochimaru. He might also be able to create shields of light to protect his village from attacks.
Well, perhaps Naruto could be sent to protect a certain village or person. He might use his ninja skills in a new way to fend off threats from the spirit world or other supernatural forces.
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.
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.
It's hard to say exactly without reading it. But generally, in such a fanfiction, it could be about an angel of death who is either helping or hindering Naruto and his friends. For example, the angel of death might be there to guide the souls of fallen ninjas, or it could be a more menacing figure, perhaps trying to disrupt the balance in the ninja world. It could also be a story that explores the afterlife in the context of the Naruto world through the eyes of this angel of death.
One possible plot could be that Naruto, through some dark magic or a curse, is transformed into a Death Knight. He might initially struggle with his new form and the evil tendencies that come with it. But, being Naruto, he tries to use his new powers for good. For example, he could use the Death Knight's necromantic abilities to protect the Hidden Leaf in a new way, like raising undead minions to fight off invaders while trying to find a way to reverse his transformation.
One possible plot could be that Naruto somehow gets transported to the Darksiders universe and is mistaken for Death. He then has to adapt to this new, darker world while also dealing with the enemies and challenges that Death would typically face.
A possible plot could be that Naruto has a near - death experience and in that state, he encounters Lord Death. Lord Death offers him a deal: to become his disciple in exchange for the power to protect his loved ones better. Naruto accepts and starts to train under Lord Death. As he learns more about Lord Death's domain and powers, he has to make difficult choices between his old ninja life and this new path. His friends in Konoha start to worry about him as he changes, and there is a struggle to keep his relationships intact while following this new calling.
Maybe Naruto gets transported to the world of Death Knights. He could use his ninja skills in a new way, like combining his chakra with the powers of a Death Knight. For example, his Rasengan could be infused with Death Knight magic.
Well, one possibility could be a crossover where Naruto somehow ends up in the world of Death the Kid. Maybe Naruto's chakra is mistaken for some kind of unique soul energy. And Death the Kid, being the perfectionist he is, might be intrigued by Naruto's unruly and yet powerful nature. They could team up to fight some common enemy that threatens both their worlds.