An OC that is a time - traveler from the future could be interesting. This OC arrives in the Devilman Crybaby world with the knowledge of the impending doom. They could try to change the course of events, maybe by uniting the Devilmen and humans in a way that didn't happen in the original story. But they would face many challenges, such as being seen as an outcast and having to prove their intentions.
One idea could be an OC who is a half - devil, half - angel. This OC could struggle with their dual nature, trying to find a balance between the chaotic and violent tendencies of the devil side and the peaceful, harmonious nature of the angel side. They might get caught in the middle of the war between devils and humans in the Devilman Crybaby universe.
One idea could be a crossover with Neon Genesis Evangelion. Devilman and the Eva pilots could team up to fight a common enemy that threatens both their worlds. Maybe a new type of demon that has the ability to control Angels.
Another plot idea is to crossover with Neon Genesis Evangelion. The Angels in Evangelion could be some sort of new form of demons in the Devilman Crybaby universe. The Eva pilots might have to team up with Devilmen to fight these powerful threats. It could explore the psychological aspects of both universes as the characters deal with the new and terrifying situation.
One popular theme is the exploration of the complex relationships between the characters. For example, the relationship between Akira and Ryo is often delved into more deeply in fanfiction. Another theme could be the alternate versions of the story's events, like what if certain battles had different outcomes. Also, the inner turmoil of the characters, such as Devilman's struggle with his dual nature, is a common theme in fanfiction.
Appearance matters too. You could give your OC a unique look. Maybe they have heterochromia (two different - colored eyes) which is a sign of their connection to both the human and devil worlds. Their clothing style could also be a mix of modern and ancient, representing the blend of cultures in the Devilman Crybaby universe.
One challenge is integrating the different power systems. Naruto has chakra - based powers like ninjutsu and genjutsu, while Devilman Crybaby has demonic powers. It's hard to make them work together in a believable way.
In this fanfiction, perhaps it delves into the emotional connection between Akira and Miki. Akira's transformation into Devilman could add a lot of drama to their relationship. Miki might be the one who tries to understand Akira's new self, and they could go through a journey of self - discovery together.
Akira is definitely one of the most interesting. His transformation into Devilman and his internal struggle make for great writing material. Ryo is also fascinating as his true nature and his actions throughout the story give a lot to explore. And Miki, with her kindness in the midst of all the chaos, can be really interesting to write about in different scenarios, like how she copes with the truth about Akira.
One idea could be that Devilman and Devil Lady team up to fight a common enemy that is threatening both their worlds. Maybe a powerful demon from another dimension is trying to take over, and they have to combine their powers to stop it.
Ryo is often characterized as the calculating and somewhat cold - minded one. He has his own agenda and is willing to use Akira to achieve it. Akira, in contrast, is usually depicted as the more naive and good - hearted character. He is thrust into the world of devils by Ryo and has to struggle to keep his humanity intact.
One great Naruto and Devilman Crybaby fanfiction is 'The Crossover Chronicles'. It combines the unique powers and worlds of both series in an interesting way. The characters from Naruto, like Naruto himself and Sasuke, interact with the complex characters from Devilman Crybaby, creating new storylines and character developments.