One common theme is identity. Since Ciel is female in these fanfictions, she often has to grapple with how she is perceived in a male - dominated society like the Victorian era. Another theme is relationships. Her relationships with Sebastian and other characters are re - imagined in different ways.
Many 'female ciel fanfiction' explore the theme of adaptation. How does she adapt to the situations that are different from what the male Ciel in the original story faced? For example, she might face different social expectations. And the theme of self - discovery is also common. As she goes through various trials, she discovers more about herself and her place in the world.
One common theme is the exploration of gender roles. Since Ciel is male in the original but is female in these fanfictions, it often delves into how different her experiences would be in the Victorian - era setting of the story. For example, how she might face different social expectations compared to her male counterpart.
One common theme is the exploration of a different kind of relationship dynamic. Since Ciel is female, there can be more of an emphasis on romantic or platonic love. Another theme could be the role - reversal in some aspects. For example, how a female Ciel might handle certain situations differently from the male version. Also, the theme of self - discovery for Ciel as a female in a world dominated by men can be present.
Romance is also a big theme. A female Ciel might be paired with different characters in new and interesting ways. It could be with Sebastian in a different dynamic than in the original, or with other characters from the 'Black Butler' universe. Writers often explore how a female Ciel's relationships would develop in terms of love and friendship.
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.
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.
Another theme is the alteration of relationships. If Ciel is a girl, her relationships with characters like Sebastian or other nobles will be different. For example, a romantic relationship with Sebastian might be more complex or taboo due to the gender change. Also, her friendships might change as other characters might view her differently. In some fanfictions, she might form closer bonds with female characters as a result of being a girl herself.
One common theme is identity. Since they are from different universes, exploring how Harry and Ciel adapt to each other's worlds and how it affects their sense of self. Another could be friendship or rivalry, depending on how the author writes their relationship.
One common theme is the exploration of power dynamics. Sebastian is a powerful demon and Ciel, even as a female in these fanfictions, often has her own form of power, be it through her position or her own wits. Their relationship is often a dance of power, with Sebastian being dominant but Ciel trying to assert herself in different ways.
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.