Well, perhaps the fanfiction could revolve around a human who is unknowingly part of a secret experiment by Lucifer. The human manages to find out about it and decides to escape. The story could focus on their journey of escape, how they use their wits and any hidden strengths they might have. They could also meet other characters, either helping or hindering their escape from Lucifer's control.
One possible main plot could be that a human discovers a secret about Lucifer that Lucifer is trying to keep hidden. Maybe the human stumbles upon a hidden power of Lucifer or a plan he has. The human then tries to escape Lucifer's clutches while also trying to figure out what to do with this new - found knowledge. They might face various obstacles along the way, like Lucifer's minions or supernatural forces.
The main plot might be that the human has a special ability that Lucifer wants to use for his own purposes. The human, realizing this, tries to escape. This could lead to a chase where the human has to keep one step ahead of Lucifer. They might find allies among other humans or even supernatural beings who oppose Lucifer. As the human escapes, they could also be uncovering more secrets about Lucifer's true nature and his long - term plans.
Definitely the human at the center of the story. Maybe a young woman named Lily who has a strong will to survive and escape. Then Lucifer, who is the main antagonist. There might also be an old wise man, a hermit who has some knowledge about Lucifer's secrets and gives the human some crucial advice on how to escape. And perhaps a demon who is not entirely loyal to Lucifer and ends up being an unexpected ally to the human.
One idea could be that Crowley from 'Good Omens' and Lucifer from 'Lucifer' meet in a neutral realm. They start off as rivals, each thinking they are the most devilish. But as they interact, they realize they have more in common than they thought. Maybe they team up to play a prank on some self - righteous angels, which goes awry in hilarious ways.
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.
Well, it could be about Alec being in a strange situation and suddenly meeting Lucifer. Maybe they start off as enemies but then find common ground as the story progresses. For example, they might both be after the same magical artifact and end up having to work together to get it.
One possible plot could be that Bella has been living a normal life until she starts having strange visions or experiences that lead her to discover she's Lucifer's sister. As she delves deeper into this new reality, she meets other supernatural beings who either want to help her or use her for their own purposes. There could be a love interest who is either a human trying to understand her new world or a supernatural being who is attracted to her unique situation. The story could also explore the family dynamics between Bella and Lucifer, whether they have a loving or a strained relationship, and how that affects the events in the story.
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, 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.
Maybe Lucifer kidnaps the angels because he believes they hold a secret that can help him regain his former glory. He subjects them to various forms of interrogation and tests in his lair. The angels, on the other hand, are trying to keep the secret safe while also looking for a way to escape. Meanwhile, the other celestial beings are searching for the kidnapped angels and preparing for a possible battle with Lucifer if he doesn't release them.
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.
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.