Power dynamics is also a frequently explored theme. Given Ciel's position as the Earl, there are interesting interactions regarding power and control between him and the male oc. Sometimes, the male oc might be in a position to challenge Ciel's authority, or they might work together to gain more power in the complex world they inhabit. This creates a lot of tension and drama in the fanfiction.
A common theme is adventure. The male oc often joins Ciel on his various missions and investigations in the Black Butler world. Another theme is friendship that could potentially turn into something more. It shows how their bond grows over time.
One common theme is the idea of the OC being a source of change for Ciel. Since Ciel has a rather dark and set - in - his - ways personality, the OC often comes in and shakes things up, like bringing more light into his life.
Love and romance are also common. Sometimes the Ciel OC falls in love with one of the existing characters, like Ciel himself or another member of the Phantomhive household. This can lead to all sorts of interesting relationship - based storylines, with the added twist of the OC's unique personality and backstory.
One common theme could be identity. Since there are two Ciels, the question of who is the 'true' Ciel might be explored. Another theme could be family, as they are brothers and their family history and relationships play a role.
In some ciel x lizzy fanfictions, there is a theme of self - discovery. As they interact more, they learn more about themselves. Ciel might discover a softer side of himself because of Lizzy, and Lizzy might find more strength in herself. Also, the theme of loyalty often comes up, as they prove their loyalty to each other in different situations in the stories.
Love and devotion are very common themes. Most fanfictions focus on how deeply Elizabeth loves Ciel and vice versa, despite all the difficulties they face.
A common theme is the love triangle. Ciel and Alois both vying for the reader's attention, which creates a lot of tension. Another theme is the contrast between Ciel's more reserved nature and Alois' more erratic behavior. The reader often has to navigate these differences.
The theme of secrecy also pops up a lot. Given the nature of their relationship and the unusual situation of mpreg, they often have to keep it a secret from others. This secrecy adds a layer of tension and mystery to the story, as they try to navigate their lives without others finding out about this major change in their relationship.
Another theme is the exploration of their complex emotions. They both have had difficult pasts, and fanfiction often delves into how they deal with their feelings for each other. For example, how Ciel's cold exterior might crack in the face of Alois's more wild and passionate nature. Also, themes of redemption and acceptance can be found, as they learn to understand and accept each other's flaws in these stories. This can be really interesting as it shows a different side to their characters that may not be fully explored in the original source material.
Common themes in sebastian x ciel lemon fanfiction include the transformation of their relationship. In the original, it's more of a contract - based relationship. But in fanfiction, it can become a love - based one. There's also often a focus on the physical and emotional attraction between them. The allure of Sebastian's otherworldly nature and Ciel's determination and hidden desires are usually highlighted. This can lead to themes of self - discovery for both characters as they navigate this new type of relationship.
Redemption is also a theme that appears sometimes. Undertaker may be portrayed as having a chance at redemption through his interactions with ciel. This could involve him trying to make up for past wrongs or helping ciel in a way that goes against his previous actions. Fanfictions might explore how this redemption arc could play out and how it affects both characters.