The theme of leadership also often appears. Both are leaders in their own right. Fanfics might show how they lead together in a joint mission, or how they influence each other's leadership styles. For example, Wonder Woman's more ancient and mythical leadership might influence Captain America's modern - day approach, and vice versa.
A common theme is the clash and then the fusion of their different ideals. Captain America, with his more modern American values, and Wonder Woman, from the Amazonian culture, often have to find common ground. Another theme is their leadership. They are both natural leaders, so fanfics often explore how they lead together or take turns leading in a mission.
Growth is a common theme. Since it's about a 'baby' Captain America, it often shows his journey of growing into the hero we know. Another theme is friendship, like his early bonds with Bucky. These fics might explore how those relationships were formed when he was younger.
Friendship is a very common theme. Since they are both part of the Avengers, many fanfics explore how they become friends and support each other. For example, they might show Hawkeye cheering up Captain America after a tough battle.
One common theme is identity. Since she's Captain America's daughter, she often has to figure out who she is apart from her father's famous name. Another theme is legacy. She has to decide whether to carry on her father's work or forge her own path. Family is also important, like how she deals with the loss of her father or the relationship with her mother if she's in the story.
The theme of friendship and teamwork also comes up a lot. Since Captain America is often part of a team, OCs in fanfics are usually involved in relationships with other characters. They learn to work together, trust each other, and support one another. This can lead to some great character - driven stories where the OC's relationships with characters like Bucky Barnes or Sam Wilson are explored in depth.
One common theme could be loss. Captain America has lost so much, from his old life in the 40s to friends over the years. So, a fic might show him crying over the loss of a comrade or the world he once knew.
One common theme is the contrast between their ideologies. Batman is more of a lone vigilante with a darker view of justice, while Captain America is a symbol of patriotism and upholds a more idealistic view. Fanfics often explore how they bridge this gap.
Another theme is the sister's own journey of self - discovery. Since she's related to a famous hero, she has to find her own place in the world. This could involve her developing her own powers or skills, like learning martial arts to be able to protect herself and help her brother. It's about her growing as a person while being part of Captain America's story.
A lesser - known but really good one is 'When Cap Met WW'. This fanfic focuses on the first encounter between them. It describes in detail their initial impressions of each other. Wonder Woman is intrigued by Captain America's unwavering belief in his values, and Captain America is in awe of Wonder Woman's power and grace. It's a beautifully written piece that captures the essence of their characters.
Common themes often include them teaming up in unique ways that lead to a deeper emotional connection. For example, they might go on a mission together that forces them to rely on each other more than usual, and this could be the start of a relationship in the fanfic. Also, themes of mutual respect and admiration are frequently explored, as they are both heroes with different but equally valuable skills and qualities. Another aspect could be the exploration of how they deal with the public's perception of their relationship if it was more than just a friendship in the fanfic world.