Identity struggle is another theme. Characters might struggle with their identity in relation to Satan, especially if they are on the side of the exorcists. In a yaoi relationship with Satan, they have to deal with not only their feelings but also their place in the world of exorcism and the conflict it creates with their relationship.
One common theme is the power dynamic between Satan and the other character. Since Satan is a very powerful figure in the Blue Exorcist universe, exploring how that power affects a relationship in a yaoi context can be interesting.
Fanfiction.net could also be a place to look. However, the quality and quantity might vary. Some authors might post their Blue Exorcist Satan x Yaoi fanfictions there. But be aware that you may need to sift through a lot of content to find exactly what you're looking for.
A frequent theme is the idea of characters from different worlds coming together. For instance, Harry Potter and Rin Okumura might meet and form an alliance. Another theme could be the exploration of good and evil in both universes. In 'Harry Potter', there are dark wizards, and in 'Blue Exorcist', there are demons. Fanfictions might show how the characters from each world deal with the concept of evil. Also, the theme of friendship across different magical realms is quite common, as characters build relationships despite their different backgrounds.
Many Blue Exorcist x Reader fanfictions also explore the theme of redemption. Maybe the reader character has a past they're not proud of, or they encounter a character from the show who is in need of redemption. It can be a really interesting way to develop the story and the relationships between the characters. Also, the theme of loyalty is common. The reader character might have to prove their loyalty to their friends or the exorcist order, and this can lead to some great character - driven storylines.
One common theme is the growth of their relationship. Since Rin is a demon - human hybrid and Shiemi has her own insecurities, their relationship development is often explored. For example, how they learn to trust each other more deeply.
Love and friendship are also big themes. The relationship between Rin and the OC can range from a slow - burning friendship that turns into love, to an instant attraction. In many stories, they support each other through difficult times, like when facing powerful demons or dealing with the politics within the exorcist community.
Good fanfiction in this pairing often has well - developed characters. It stays true to the personalities of Rin and Bon from the original series. For example, Rin's impulsive yet kind - hearted nature and Bon's more serious and studious side should be maintained.
One common theme is the power struggle. Given that Rin is a powerful exorcist and Amaimon is a demon, there's often a tug - of - war between their powers and how they deal with it in their relationship. Another theme could be the exploration of their different natures, with Rin being half - human and half - demon and Amaimon being a full - fledged demon.
One common theme is the relationship development between them. Writers often explore how their initial interactions, which might be a bit rocky or professional, turn into something more romantic or at least a deep emotional connection.
A frequently seen theme is the interaction between different character personalities. In a crossover with 'Naruto', for instance, the determined and often hot - headed characters from 'Naruto' meet the more reserved or complex characters from 'Blue Exorcist'. This leads to some interesting character development and relationships. Also, the theme of good vs evil in a new context is common. Since both the original 'Blue Exorcist' and the crossed - over series usually have their own ideas about what is good and what is evil, it creates new scenarios to explore this concept.
One theme that pops up a lot is the struggle with their exorcist duties while also dealing with their feelings for each other. They have to fight demons and protect the world, but at the same time, they are developing these complex emotions. It's like a balance between their personal lives and their responsibilities. And also, the theme of acceptance is there. They have to accept each other's flaws and strengths as they get closer.