Love is also a theme that pops up in undertaker x othello fanfiction. It might be a slow - burn kind of love, starting from a simple acquaintance and gradually developing into something deeper. Writers often explore how their different personalities would interact in a romantic relationship.
One great place to start looking for undertaker x othello fanfiction is on Archive of Our Own (AO3). There are often various works there. Some might focus on exploring their relationship in a modern AU (alternate universe), where they could be coworkers or neighbors and develop a unique bond.
One common theme is the exploration of an unlikely relationship. Given their different characters, seeing how they get along or fall in love is often explored.
Common themes include exploration of different cultures or worlds. If Undertaker is from a different fictional realm than Harry's wizarding world, the fanfictions might explore how they both react to each other's cultures. Another theme could be the search for identity. Harry is constantly growing and finding out more about himself in the original series, and when paired with Undertaker, this exploration can take new and interesting turns, like how they influence each other's self - discovery.
Another theme is adventure. They might be sent on some sort of mission or journey together, and during this time, their relationship develops. It could be a quest related to the supernatural elements in the 'Black Butler' world, like dealing with other demons or solving mysteries about the afterlife.
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.
Power and control are also often explored. Ciel is a powerful young lord, and Undertaker has his own kind of power. Fanfictions play around with who has the upper hand in their relationship. There's also the theme of sacrifice. They both have things they might be willing to sacrifice for the other or for their own goals. It makes for some really interesting and emotional storylines.
Redemption is also a theme. Given his somewhat dark character, a lot of fanfictions explore the idea of him finding a way to redeem himself or make up for past actions. It adds a layer of depth to his character and makes for an interesting read as you see him transform in different ways.
The theme of power dynamics is quite common too. In undertaker x ciel fanfic, we often see how the power balance between them shifts. Ciel, as a young noble with his own authority, and the Undertaker, with his unique skills and knowledge, interact in ways that show a constantly changing power dynamic. And there's also the theme of trust, as they have to learn to trust each other in many of these fan - created stories.
Another theme is the power dynamic. Ciel is a young noble with his own kind of power, while Undertaker is a very powerful and somewhat otherworldly figure. Fanfics play with how their different levels of power interact and influence their relationship. For example, sometimes Ciel tries to assert his authority over Undertaker, but Undertaker has his own ways of getting what he wants.
One common theme is mystery. The undertaker is a very mysterious character in 'Black Butler', so when paired with an OC, the fanfiction often delves deeper into the secrets of the 'Black Butler' world. Another theme is romance. Given the undertaker's allure, many fanfictions explore a romantic relationship between him and the OC. And also there's the theme of self - discovery. The OC might learn more about themselves through their interactions with the undertaker.