One common theme is redemption. Often, the oc is involved in Lucifer's journey towards redemption or self - discovery. Another theme is power struggle. Since Lucifer is a powerful being, the oc may have to navigate power dynamics with him. Also, love and friendship are common themes. The oc can form deep emotional bonds with Lucifer, whether it's platonic or romantic.
There are several interesting lucifer morningstar oc fanfictions. For example, 'The OC's Influence on Lucifer'. In this story, the original character has a profound impact on Lucifer's decisions and actions. It shows how an outsider can change the course of a powerful being like Lucifer. Another good one is 'Lucifer and the Mysterious OC'. Here, the oc has a mysterious past that gradually unfolds and intertwines with Lucifer's own story. 'In the Shadows with Lucifer' is also worth reading. The oc in it helps Lucifer face his inner demons in a new and unexpected way.
Another theme is the power dynamics. Given Lucifer's status as a fallen angel and his powers, how does his relationship with his wife (the OC) affect or change the power balance? For example, does she gain some powers through their connection? Or does she help him control his more devilish tendencies?
You can start by looking on fanfiction websites like Archive of Our Own (AO3). It has a large collection of fanfictions, and you can simply search for 'Lucifer Morningstar wife OC' in the search bar. There are often filters you can use to sort by popularity, rating, etc.
I'm not entirely sure if there is a large amount of it, but given the creativity of fanfiction authors, it's highly likely that someone has written a story where Naruto has some sort of connection to Lucifer Morningstar. It could be a really strange or really cool concept, depending on how the author approaches it. You could also check out some Naruto or Lucifer Morningstar fan forums to ask if anyone knows of such fanfiction.
There's also 'Lucifer's Redemption Arc' which is really interesting. This fanfiction focuses on Lucifer's attempts to fully redeem himself in a world that still has its doubts about him. It has some really well - written dialogue that brings out the essence of the character.
Another theme is self - discovery. As a human, Lucifer has to figure out who he is without his devil powers. He might discover new aspects of his personality, values, and beliefs. This can lead to some really interesting character development in the fanfiction, as he navigates the human world and tries to understand his place in it.
One common theme is the clash of different power systems. For example, when Lucifer Morningstar crosses over with other supernatural or heroic universes, his power as the devil is pitted against different forms of power like magic or super strength. This creates a lot of tension and interesting power - play in the stories.
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.
Themes in female Lucifer Morningstar fanfiction are quite diverse. One that comes up often is the theme of transformation. This can be physical, like her appearance as a female, but also emotional and mental. She may transform from a more self - centered being to one who cares about others. Another theme is the concept of free will. Given her nature, fanfictions often explore how she exercises her free will. And the theme of resistance is also there. She may resist the roles that others try to impose on her, whether it's the role of a villain or a savior.