The transformation of the character due to the possession can also be a common theme. For example, the character might start to exhibit different behaviors, gain new abilities or lose their original sense of self. This can lead to internal and external conflicts as other characters in the story react to the changed person.
One common theme could be the struggle between the possessor and the possessed. The character with black eyes might represent an otherworldly or dark force taking over someone's body or mind.
Another theme might be the mystery surrounding the black eyes. It could be a symbol of a hidden power or a curse. In many fanfics, there would be elements of the main character trying to understand what the black eyes mean and how to break free from the possession if it's unwanted.
Power struggle is a common theme. When a character is possessed, they often have to struggle with the new power that comes with the possession. For example, if Naruto is possessed by a powerful entity, he may find it hard to control the sudden influx of strength. Another theme is identity. The possession can change who the character is, and they have to figure out if they are still themselves or something else. Also, there is the theme of conflict. Possession can lead to conflict with other characters who may see the possessed character as a threat or something unnatural.
One common theme is the struggle for control. When a character is possessed, there's always a fight between the possessor and the possessed for dominance over the body. Another theme is the effect on relationships. Friends and allies of the possessed character have to deal with the changed behavior and try to save them.
There might not be a lot of widely known 'black eyes possession fanfic' readily available. However, if you are part of a fan community related to a particular series (if this is based on an existing series), asking within that community might yield better results. They may be able to point you to some hidden gems in this specific type of fanfic.
One common theme could be the struggle between the possessed character's normal self and the demonic influence, especially in the context of a gay relationship. For example, how the possession affects the relationship dynamics, like causing misunderstandings or testing the loyalty of the partners.
Self - discovery is also a common theme. Characters with the black soul or silver eyes often go on a journey to understand themselves better. They learn about their powers, their place in the world, and their relationships with others. This can involve facing their fears, making difficult choices, and growing as a person. In many fanfictions, this journey is full of emotional ups and downs, making it very engaging for readers.
Another theme is the origin of the Red Eyes Black Dragon. Fanfictions may delve into its backstory, perhaps creating a more detailed and elaborate history compared to what is shown in the original Yu - Gi - Oh! series. For example, some might write about it being from a long - lost dragon clan. There could also be themes related to the relationship between the dragon and its owner or summoner. How they bond, and how their connection affects the battles they are in is often explored in these fanfictions.
Love and friendship are common themes. If the emerald - eyed character is a main focus, their relationships with others, whether it's a romantic love interest like Harry or a strong friendship with Ron, could be explored. Another theme could be self - discovery. The character might be on a journey to understand their own powers or identity, and the emerald eyes could be a part of that discovery.
Another theme is the power associated with those green eyes. In the Twilight lore, there could be something special about the character with green eyes, and fanfics may expand on this power, like it could be a hidden ability or a source of great influence.
The exploration of his relationship with Sirius is also a common theme. Since they are brothers with very different paths, fanfics often dig into their complex relationship, from their childhood rivalry to the possibility of reconciliation or understanding in different situations.
One common theme is survival. Given the nature of the game, fanfics often revolve around the characters' struggle to survive in difficult combat situations.