Well, in 'Code Geass OC x Kallen fanfic', loyalty is a big theme. The OC might have to prove their loyalty to Kallen and her cause. Another theme is the idea of sacrifice. In the world of Code Geass, characters often have to make sacrifices for the greater good. The OC could be in a situation where they have to sacrifice something for Kallen or their shared goals. And of course, the theme of acceptance is there too. Kallen might need to accept the OC, who could be very different from the people she usually associates with.
Their relationship could develop through shared goals. For instance, if they both aim to overthrow a corrupt regime within Britannia. Working side by side towards this common objective would make them rely on each other, leading to mutual respect and eventually love.
One possible plot idea could be that the OC Prince, who might be from a different region or have a unique background in the Code Geass universe, meets Kallen during a battle or a political intrigue. Their initial encounter could be filled with suspicion and hostility, but as they are forced to work together, they gradually develop feelings for each other. For example, they might have to team up to rescue a mutual friend or stop a new threat to Britannia and the Black Knights.
One common theme could be power struggles. Since Code Geass is about a world with complex power dynamics, Marrybell OC fanfics might explore how an original character fits into that, whether they are trying to gain power, resist it, or something in between.
One common theme is power and its corrupting influence. The male OC often has to deal with the allure and danger of power in the Code Geass world. Another theme is identity. Since the OC is original, there's a focus on how he discovers and defines himself within the context of the existing story.
One way to find good 'Code Geass OC x Kallen fanfic' is to check fanfiction websites like FanFiction.net or Archive of Our Own. Search for the specific pairing and look at the stories with high ratings and reviews. Some might be centered around an original character's journey and their relationship with Kallen in the Code Geass universe.
This fanfic idea presents a very interesting twist on the original Code Geass story. It would be exciting to see how the story unfolds with Kallen on the side of Britannia. Her skills and abilities could be used in different ways. For example, she could use her piloting skills to fight for Britannia against new threats, which would completely change the power dynamics in the Code Geass universe.
Often, in 'Code Geass OC x Shamna' fanfics, there are themes related to power and power dynamics. Since Code Geass is a series that deals with power - granting abilities, the OC might have their own unique power that interacts with Shamna's character in different ways. Also, themes of loyalty and betrayal can be present, especially when the OC has to make choices that involve Shamna and other characters from the Code Geass world.
The 'Code Geass Kallen Expansion Fanfic' is probably about taking Kallen's character from Code Geass and building on it. It could be a story that gives more screen time to her motives. Maybe it shows how she became so dedicated to the cause of the resistance. It could also detail her relationship with Suzaku from a different perspective. It might add more depth to her character by showing her making difficult decisions that were not shown in the original series and how those decisions shape her future in this fan - created expansion.
One common theme is the power dynamics. Since 'Code Geass' has a complex power structure, in the harem fanfics with Villetta OCs, the OC often has to navigate the power plays between different characters. Another theme is loyalty. The harem members may have different loyalties, and the Villetta OC has to deal with that.
The appeal lies in the contrast between the two characters. Kallen is passionate and driven by her beliefs, while C.C. is more mysterious and detached. Their relationship in fanfics can bring out new and exciting dynamics.