Alois could be a main antagonist. In a high school setting, he might be the jealous rival of Ciel. He could try to undermine Ciel's position as student council president or spread rumors about him. His butler, Claude, would be helping him with his devious plans.
Perhaps in the fanfiction, the high school is divided into two factions like in the original with the demons and those who oppose them. Ciel has to navigate through high school life while also dealing with this power struggle. He could make friends who are actually on different sides of this hidden battle, and Sebastian helps him out in various ways, like getting him out of tricky situations with teachers or rival students.
One idea could be that Ciel is the new student council president, trying to reform the school's old - fashioned rules while dealing with a rival group led by Alois. Sebastian could be his loyal butler and also a star student in various subjects, secretly helping Ciel with his plans.
First, you need to familiarize yourself with both 'Black Butler' and 'High School DxD'. Know the characters, their personalities, powers, and the general storylines. Then, come up with an interesting concept. It could be a simple crossover where the two worlds collide, or something more complex like a shared mystery that both sets of characters need to solve. Next, create an outline of your story, including the beginning, middle, and end.
Lizzie could be a popular cheerleader - type character. She's always trying to get Ciel's attention and is really good at sports. But she also has a bit of a temper when it comes to other girls getting too close to Ciel. And then there could be a new character, a shy transfer student who gets caught up in the drama between Ciel and the other students, and she has her own special abilities that she's not aware of at first.
One popular 'Black Butler High School DxD' fanfiction might be those that focus on crossovers. For example, a story where the characters from 'Black Butler' end up in the 'High School DxD' universe and have to adapt to the different rules and powers there. Another could be a fanfiction that delves into the relationships between the characters of both series in a high - school setting, exploring how they interact and form new alliances or rivalries.
One interesting plot could be the main characters adapting to high school rules while still maintaining their unique 'Black Butler' characteristics. For example, Sebastian might use his skills to excel in home economics class, making perfect tea and pastries. Another plot could involve the students uncovering a mystery within the high school that has ties to the supernatural world, just like in the original 'Black Butler' series.
Ciel and Sebastian are usually the most popular. Ciel with his cool and calculating demeanor, even in a high school setting, is quite appealing. And Sebastian, with his charm, loyalty to Ciel, and his many skills, always draws a lot of attention. People love to see how they interact with the high school environment and other characters.
Yes, of course. Their unique personalities and relationships in the original work are the main sources of inspiration for fanfiction writers. Writers often base their stories on the existing characters' traits and the chemistry between them.