Another aspect could be the characters' relationships with real - world people. Ciel could form an unlikely friendship with a modern - day detective. They would exchange knowledge, with Ciel sharing his insights from solving mysteries in his world and the detective teaching Ciel about modern - day forensics. This could lead to a series of adventures as they work together to solve crimes in the real world.
Sebastian, being a demon, would have an easier time adapting in some ways. He could use his powers subtly. For instance, his speed could be used to quickly move around in a busy city without being noticed. He'd also be intrigued by modern cuisine and might experiment with new ingredients while still maintaining his high - class cooking standards.
Maybe a plot where Sebastian and Ciel are attending a high - school in the real world. Ciel is the new student who is a bit of an enigma, and Sebastian is his butler who also doubles as a teacher at the school. There could be a mystery surrounding a series of strange events at the school, like students disappearing. Sebastian and Ciel use their skills from their original world to investigate. Ciel uses his intelligence to piece together clues, and Sebastian uses his supernatural abilities discreetly to protect Ciel and solve the mystery.
Another plot could involve a real - world detective who stumbles upon the existence of Ciel and Sebastian. The detective is initially skeptical but as he witnesses their abilities, he becomes involved in their world. This could lead to a series of adventures where the detective has to learn to work with the duo from the Black Butler universe to solve crimes that are somehow related to the dark secrets of the Phantomhive family in the real - world setting.
A love story for Pluto might develop through shared experiences. For example, if there was a threat to the manor and Pluto and this potential love interest had to work together to protect it. During this time, Pluto could realize his deeper feelings for her. His loyalty to the manor and his newfound love could merge, making him even more determined to protect both.
I think Grell would be really interesting. In the real world, Grell's flamboyant and over - the - top personality would create a lot of chaos. He could be a fashion designer or something similar, still with his love for the color red and his chainsaw. His interactions with Sebastian would be hilarious, as Sebastian would be constantly trying to keep him in line while also dealing with the real - world problems.
Ciel would likely become more cold - hearted. His experiences as a human, especially the trauma he endured, would be amplified by his new demonic nature. He might lose some of his remaining humanity, such as his sense of compassion.
To develop the triplets' characters, explore their backstories. Maybe they came from a difficult past that made them so close and reliant on each other. You can also show their growth over time. For instance, if at first they were shy around their master but as they gain more experience and confidence, they become more assertive in their service. This development can be shown through their interactions with other characters and how they handle various tasks.
One idea could be creating a story where a new character arrives at the Phantomhive manor with a special power that Ciel is initially suspicious of but later realizes can be useful in his battles against his enemies. For example, the power to communicate with the dead, which could provide valuable information in their investigations.
The plot might start with Harry being taken in by Pitch Black at a very young age. Then, he would be taught things that are not part of the normal Hogwarts curriculum. As he grows older, he might start to question the motives of Pitch Black. This could lead to a conflict between them, and Harry could decide to break away and find his own path in the wizarding world, perhaps with the goal of using his unique skills for good.
It can enhance the fandom by providing more content. Fans are always hungry for more stories, and fanfiction fills that gap.