One common theme is the struggle between their different natures. Grell is passionate and somewhat chaotic, while Sebastian is composed and calculating. Fanfics often explore how these opposing traits interact and either clash or draw them together.
Another theme is the idea of forbidden love. Given their positions in the 'Black Butler' universe, a relationship between them goes against the norms and loyalties they are supposed to uphold. Many fanfics build on this tension and the consequences that come with it.
The theme of redemption also sometimes appears. Grell has his own set of misdeeds, and Sebastian is far from a saint. Some fanfics play with the idea of them finding redemption through their relationship, as they learn from each other and perhaps change for the better in the process. It's an interesting way to explore their characters more deeply.
In sebastian x grell fanfiction, a frequent theme is power dynamics. Sebastian is a powerful demon and Grell, though not as powerful in the same way, has his own kind of strength. How they interact in terms of power, who dominates and who submits at times, is often explored. Another theme is the idea of fate. Whether they are fated to be together or are constantly fighting against their fated roles in their own worlds.
A lot of Grell x Sebastian fanfictions have the theme of redemption. Maybe Sebastian finding a way to be redeemed through his relationship with Grell or vice versa. Also, the theme of sacrifice can be found. For example, one of them might have to sacrifice something important for the sake of their relationship. And there's also the theme of mystery, as their relationship is full of unknowns and secrets.
One great 'sebastian x grell fanfic' is 'The Demon and the Reaper's Unlikely Bond'. It beautifully weaves their complex relationship, with detailed descriptions of their interactions and how they gradually understand each other despite their differences.
In this type of fanfiction, the theme of self - discovery is also popular. Sebastian and Grell might discover new aspects of themselves through their relationship. The 'lemon' part can play into this as they explore their desires and boundaries. Additionally, themes related to the afterlife or the supernatural world they inhabit can be incorporated. Their relationship could be something that defies the rules of the supernatural realm, and this can create a lot of interesting storylines and twists.
One common theme is the exploration of their contrasting personalities. Undertsker's calm and collected nature against Grell's more flamboyant and passionate self. Another theme is the idea of finding common ground in their differences. They may seem like an odd pair, but fanfics often show how they can complement each other.
A prevalent theme is the development of their relationship. Fanfics often show how they start from just colleagues or acquaintances and gradually grow closer. It could be through shared experiences like facing a difficult case or a common enemy. There's also the theme of self - discovery within the relationship. As they interact more, they learn more about themselves. For example, Grell might learn to be more patient because of Ronald, and Ronald might become more open - minded due to Grell's unique perspective.
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.
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.
Another theme is the idea of forbidden love. In the context of the Black Butler universe, their relationship might be seen as going against certain rules or norms, which makes for an interesting dynamic in fanfic stories. Many fanfics will build on this sense of the relationship being something that should not be, but is.
Tumblr can also be a source. There are many fanfic writers who post their 'sebastian x grell' works on Tumblr. You can search for relevant tags or follow blogs that are known for sharing such fanfics.