Adventure themes might also be present. Maybe they go on fictional adventures together in the fanfics, facing challenges and growing closer as a result. For example, they could be on a journey to discover a new place or solve a mystery.
One common theme could be friendship exploration. Since they are both content creators, fanfics might explore how their friendship could develop in different scenarios.
I'm not sure of specific ones off the top of my head. But you could try searching on fanfic websites like Archive of Our Own. They usually have a wide variety of fan - created stories.
Another theme is self - discovery. Through their relationship, both James and Regulus learn more about themselves. They might discover new aspects of their personalities or hidden desires. In some fanfics, this is shown as they face difficult situations together and have to reevaluate who they are.
One common theme is the exploration of family bonds. Since James is Harry's father, many fanfics focus on how they could have interacted if James had been alive. Another theme is the passing on of knowledge or skills from father to son.
Survival is also likely to be a theme. Given the nature of the source material, they may have to rely on each other to survive against zombies or other threats. Their relationship could be strengthened through these shared survival experiences. For example, they might have to work together to find food or shelter, and this could bring them closer together.
Friendship is a very common theme. Their strong bond as the Marauders is often explored, showing how they rely on each other, protect one another, and have a lot of fun together. Another theme is loyalty. They are extremely loyal to each other, and this is often a central part of the stories.
Often, there might be a theme of psychological exploration. Given the complex nature of both characters, the fanfic could delve into their minds, their fears, and how they deal with each other on an emotional and psychological level. For example, how James copes with the presence of the intimidating Pyramid Head and how Pyramid Head views James, who is an outsider in his world.
Adventure is another theme. Since the setting is in the wizarding world, fanfics often involve the reader and James going on adventures together, like exploring hidden passages in Hogwarts or facing dark wizards in the Forbidden Forest.
Common themes in 'james x severus' fanfics include transformation. Both characters have the potential to transform in these stories. James might become more empathetic towards Severus, and Severus might let go of some of his bitterness. Another theme is the exploration of their different backgrounds and how those differences can either be a hindrance or a catalyst for their relationship. Also, the theme of loyalty is often present, as they have to decide where their loyalties lie - with their old beliefs or with this new and unexpected relationship.
Common themes include first love. The experience of falling in love for the first time is often explored in a very detailed and emotional way. There's also the theme of identity. The OC is trying to find their place in the wizarding world, especially when in a relationship with someone as well - known as James Potter. This can lead to some internal conflicts for the OC. And the theme of loyalty is often present. Whether it's loyalty to each other in the relationship or loyalty to their friends and Hogwarts, it plays an important role in shaping the story.
One common theme is family. Since they are father - son, many fanfics explore their relationship and how they bond over their shared family heritage. Another theme is legacy. They both carry the Potter name and the stories often deal with how they uphold or change the Potter legacy. Magic is also a big theme as they both are powerful wizards and the fanfics show their magical abilities in different ways.