One common theme is the exploration of different powers. Since Edward has vampire abilities like super strength and speed, and Naruto has his ninja skills and chakra powers, how these powers interact or combine is often explored. For example, in some fics, they might train together to enhance their respective powers.
One common theme is the exploration of their complex relationship. Given their antagonistic relationship in the original work, fanfictions often delve into how they could come to understand each other on a deeper level.
Love is a very common theme. Since their relationship is at the core of these fanfictions, different aspects of their love are explored, like the intensity and the sacrifices they are willing to make for each other.
One common theme is the exploration of their deep brotherly bond in a more intense way. It's about how their connection goes beyond just being siblings.
One common theme is growth. Their relationship often shows how both Edward and Winry grow as individuals and as a couple. Another theme is sacrifice. Sometimes, they have to sacrifice their own desires for the sake of each other. For example, Edward might sacrifice his alchemical pursuits for Winry's happiness at times.
Friendship or alliance is also a big theme. Since they come from different fictional universes, stories often focus on how they form a bond. It could be due to a shared goal like saving their respective worlds or just out of mutual respect for each other's abilities.
Another theme is the power struggle. Given their different positions and abilities in the alchemy world, they often have to navigate who has more power or influence in their relationship. This can lead to some really intense and interesting scenarios.
One common theme is the exploration of their unlikely friendship or relationship. Given their differences as a werewolf and a vampire in the original story, fanfiction often focuses on how they can overcome these barriers. Another theme is the idea of redemption. They might have to atone for past actions towards each other. For example, if they were rivals before, they now seek to make up for it.
One common theme is their unbreakable brotherly bond. It's often explored in different ways, like how they would do anything to protect each other. Another theme is their journey in alchemy. Since they are both deeply involved in alchemy, fanfictions often use this as a backdrop to develop their relationship further.
A theme that frequently shows up is the power of friendship evolving into something more. Edward and Scar start off as adversaries in the original story. In fanfiction, their relationship can develop in ways that show how they overcome their differences and form a deeper bond. This often involves themes of forgiveness and understanding. Also, there may be themes related to the misuse and proper use of alchemy, as it is a central element in their world.
One common theme is forbidden love. Since Edward is a vampire and the OC is an original character, their relationship often faces obstacles just like in the original Twilight. Their different natures make their love seem impossible at times.