One common theme is family bonds. Since they are brothers in the original context, some fanfictions might explore the relationship in a different way, like a deeper emotional connection that could be misconstrued as something more romantic. Another theme could be protection, with Seto being very protective of Mokuba.
Another theme is the contrast between their two worlds. Seto's world of priesthood with its rules and Atem's more otherworldly nature. This contrast creates interesting dynamics and conflicts that drive the plot. In some fanfictions, they have to overcome these differences to be together.
Perhaps it is a story that uses the land, the 'seto dharti', as a backdrop to explore themes like family, love, and the struggle for survival. The land might play a crucial role in shaping the characters' lives, their dreams, and their identities.
One popular priest Seto x Atem fanfiction is 'The Bond Beyond Time'. It beautifully explores their relationship in a unique and captivating way. The story delves into their emotional connection and the challenges they face together.
I'm not entirely sure as I haven't read it specifically. But from what I gather, it might be related to the land (dharti) and perhaps the relationship between people and the environment.
Fanfiction.net is also a good place to look. However, the tagging system might be a bit different. Make sure to look for relevant categories and tags related to Yu - Gi - Oh! (assuming that's where these characters are from) and the specific relationship. Some authors might also post links to their works on social media platforms like Tumblr, so that could be another source.
I'm not sure as I haven't read it. But from the title, it might be about a priest who is involved in corrupt activities, so perhaps the main theme could be the exploration of corruption within a religious or spiritual context.
In some yami and seto fanfictions, Yami might be depicted as the more mysterious and powerful one. Seto, on the other hand, is often shown as the proud and wealthy character. Their interactions can range from intense rivalries to unexpected alliances or even romantic undertones. However, in lemon fanfictions, these characteristics can sometimes be exaggerated for the sake of the plot.
Maybe Seto is trying to understand Yugi better in order to outwit him in some future duel. He could be observing Yugi's mannerisms, strategies, and how he interacts with Yami, all to gain an edge.
I don't know what the fourth side story of the Soul Suppressing Priest refers to. If you can provide more information, I will try my best to answer your questions.