One popular theme is the power dynamic between Sebastian and the reader. Since Sebastian is a demon with great power, it often leads to situations where the reader is in a vulnerable yet alluring position. Another theme could be the exploration of the supernatural world through their relationship. For example, how the reader gets involved in the dark and mysterious affairs that Sebastian is a part of.
A common theme is the transformation of the relationship. At first, it might be a simple master - servant relationship, but as the story progresses in the fanfiction, it turns into a more passionate and complex bond. Also, the theme of forbidden love is quite prevalent. Given Sebastian's nature as a demon, a relationship with a human reader is against the natural order, which adds to the allure and drama.
In Black Butler Claude x Sebastian fanfiction, a common theme is the exploration of their demonic natures. Writers often delve into how their demon instincts interact with their relationships. Also, themes of loyalty and betrayal are popular. For instance, what would make one of them betray their master for the other? It's all about the complex web of relationships and power dynamics that make these characters so interesting in fanfiction.
In Black Butler Sebastian x Grell fanfiction, there are several prevalent themes. The first is the contrast between their personalities. Sebastian is cool, collected and sly, while Grell is passionate, flamboyant and somewhat chaotic. Writers often use this contrast to create humorous or tense situations. Another theme is the exploration of their supernatural natures. As a demon and a Grim Reaper, they have different abilities and moral compasses. Fanfictions may delve into how these aspects interact when they are together. Additionally, the theme of 'opposites attract' is also popular, with Grell's over - the - top emotions being drawn to Sebastian's stoic exterior, leading to various relationship - based storylines.
The theme of mystery is quite prevalent. There are always secrets between Sebastian and Ciel. Sebastian's true nature as a demon and his long - term plans are often a mystery. In fanfiction, this mystery is sometimes deepened or resolved in different ways. And the theme of sacrifice can also be found. Ciel might have to sacrifice parts of his humanity to achieve his goals with Sebastian by his side, and Sebastian may also have to sacrifice some of his demonic desires for the sake of the contract.
One interesting plotline could be where the reader is a new servant in the Phantomhive household and Sebastian takes a special interest in her, perhaps seeing her as a unique challenge. He might start to teach her the ways of being a proper servant while also being secretly intrigued by her different perspective.
A common theme is also the exploration of their different moral compasses. Sebastian, as a demon serving Ciel, has his own set of rules and goals, which are very different from Grell's as a Grim Reaper. Fanfic writers like to play with how these two characters with such contrasting ethics interact. For example, in some fanfics, they might be forced to work together on a case, which leads to a clash of their beliefs and values.
One popular example could be those that focus on the unique relationship dynamics between the male reader character and the main characters from Black Butler. For instance, stories might explore how the male reader, with his own distinct personality, interacts with Sebastian. These fanfictions often play with the idea of the male reader being drawn into the dark and mysterious world of Black Butler, facing the same challenges and intrigues as the original characters.
One popular theme is Sebastian's relationship with Ciel in different AU (alternate universe) settings. For example, in a modern AU, how they adapt to a world without the traditional master - butler dynamic. Another theme is exploring Sebastian's past as a demon, like his experiences before making the contract with Ciel. And some fanfics focus on Sebastian's interactions with other characters from the 'Black Butler' universe in unexpected ways, such as teaming up with Grell for a particular task.
One popular trope is the 'love - hate' relationship. Grell is head - over - heels for Sebastian, but Sebastian is mostly indifferent or even annoyed. Another is the 'rivalry' trope, as they are both strong in their own ways. Grell with his unique scythe skills and Sebastian with his demonic powers.
One popular theme is the complex relationship between Ciel and Sebastian. It often explores the power dynamics, with Sebastian being a demon bound to serve Ciel. Another theme is the dark and mysterious world they inhabit. Many fanfictions delve into the supernatural elements of the Black Butler universe, like the existence of other demons and their motives. Also, the idea of Ciel's revenge and how Sebastian aids him in that quest is a common theme. It shows how their goals are intertwined despite their very different natures.
One popular theme is the power struggle between Sebastian and Claude. Since they are both highly capable butlers with their own motives, their clashes over protecting their masters or achieving their own goals make for exciting storylines. Another theme could be loyalty. Despite their devious natures, they show a form of loyalty to their respective masters, and exploring the limits and true nature of that loyalty in fanfiction can be really interesting.