A common theme could be the exploration of different personalities. Yui might be the center that shows the contrast between the god - like Apollon and the mischievous Loki. Another theme could be love and friendship. How do these three form bonds in the fictional world? It's often an interesting aspect.
Often in 'yui x apollon' fanfic, self - discovery is a theme. Both characters may be on a path to discover more about themselves. Yui might learn about her own strengths and weaknesses, and Apollon could do the same. Their relationship serves as a catalyst for this self - exploration. For example, through their interactions, Yui might realize she has a greater capacity for kindness than she thought, and Apollon might discover his own vulnerability.
Well, you can try looking on some popular fanfiction websites like Archive of Our Own. Just search for 'yui x apollon x loki' there, and you might find some interesting stories. Some fanfictions might focus on their unique relationships, like how they interact in a fantasy setting or how their different personalities clash and blend.
One common theme is the exploration of their contrasting personalities. Yui is often portrayed as gentle and pure, while Loki is more complex and mischievous. Their interactions based on these differences are often explored.
One common theme is friendship turning into love. Often, they start as friends or acquaintances and as the story progresses, their relationship deepens romantically.
One common theme is growth. Yuma and Yui might grow as individuals while being in a relationship. For instance, they could learn to be more confident or more understanding. Also, family can be a theme. Maybe their families have an impact on their relationship, either supporting or opposing it. In some fanfictions, there could be a theme of mystery, like there's a secret about one of them that the other has to uncover as their relationship progresses.
One common theme is love and redemption. Ayato may be initially portrayed as a rather difficult character, but through his relationship with Yui, he might find a path to redemption. Another theme is the exploration of the supernatural elements in their relationship, as they are often part of a supernatural world. And of course, the theme of loyalty and trust also pops up a lot, as they have to learn to trust each other in their complex relationship.
One common theme is the development of their relationship. It could be about how they overcome obstacles to be together, like dealing with family issues in the Diabolik Lovers universe.
I'm not sure about specific 'yui x apollon fanfic' but you can try searching on fanfic websites like Archive of Our Own. There might be some interesting stories there.
Some fanfictions in this category may have a theme of redemption. Maybe one of the characters has made mistakes in the past and through their relationship with the other, they seek to make amends. It's also common to see themes related to family and loyalty, as their relationships may be influenced by their families or the groups they belong to.
One common theme could be the exploration of their relationship in different scenarios. Maybe in a fantasy setting where they face unique challenges together.