A third popular theme is a romantic relationship between the male reader and one of the characters. It could be a slow - burn romance with Sebastian, where the two gradually develop feelings for each other through various encounters and shared experiences. Or it could be a more friendship - turned - love type of relationship with Ciel, as they face challenges together and start to see each other in a different light.
One popular trope is the 'forbidden love' aspect. Since Alois has a rather dark and unpredictable nature in 'Black Butler', a relationship with the reader could be seen as something that goes against the norm. Another trope is the 'damsel in distress' or 'knight in shining armor' scenario, where either the reader is in trouble and Alois saves them, or vice versa.
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 theme is the reader helping Ciel with his revenge plot. Since Ciel is on a mission for vengeance in the original series, many fanfics explore how the reader can be involved in that journey, either by providing emotional support or practical assistance.
One common theme is adventure. The male reader often goes on exciting adventures with the Black Butler characters. Another theme is friendship or bromance, as the male reader forms strong bonds with the likes of Sebastian or Ciel.
One popular theme is loyalty. The servants in Black Butler are extremely loyal to their master, Ciel. In fanfics, this loyalty often gets tested in unique situations, like facing a powerful enemy who tries to bribe them. Another theme is mystery. There are many secrets about the servants' pasts, and fanfics might explore what really happened before they came to serve Ciel. For example, Sebastian's true nature as a demon is a rich area for exploration. And a third theme could be friendship. Despite their different backgrounds and natures, the servants form a sort of family unit, and fanfics may show how they support each other through tough times.
The 'Black Butler Alois x Reader Fanfic' can also delve into the emotional aspects. The reader might be a new character in Alois's world, and through their interactions, the fanfic can develop themes of love, trust, and betrayal. Maybe the reader is initially scared of Alois but gradually gets to know his past and starts to feel sympathy for him, leading to a complex and interesting relationship.
I really like 'A Shapeshifter's Tale in Black Butler'. This fanfic focuses on the reader's character development as a shapeshifter. It starts with the reader being confused about their powers and gradually finding their place in the Black Butler universe. The relationships with Sebastian and Ciel are also well - written, adding depth to the story.
Well, one common theme is growth. The reader character may grow in confidence or understanding with Finny by their side. Also, there's often a theme of acceptance. Finny has his own quirks in the Black Butler universe, and the fanfics might show the reader accepting him for who he is, and vice versa. It's about two characters coming together and learning to be themselves around each other.
One popular theme is Snake's search for identity. Since he has a rather strange background with his snakes, many fanfictions explore where he really comes from. Another theme is his relationship with Ciel. How does he fit into the dynamic of the Phantomhive household? Some fanfictions also focus on his snakes' abilities and how they can be used in different situations, like in battles or in solving mysteries.
Some fanfics center around the idea of Sebastian and Claude teaming up, which is an interesting twist. Maybe there's a greater threat that they both realize they can't handle alone. This could be a powerful demon from their past or a new, more menacing entity. And then there are those that explore their backstories. How they became the demons they are, what events shaped them. These themes add depth to their characters in fanfic writing.