Maybe a story where the students of Lobelia Girl Academy compete in an inter - academy competition that tests not only their academic skills but also their loyalty and friendship. This would show different sides of the characters and their growth throughout the competition.
Well, often the headmistress can be a popular character. Her strictness and the power she holds over the academy make her interesting. Writers can explore her backstory and what led her to be so strict.
One common theme is friendship. Since it's a girls' academy, the relationships between the students are often explored, like how they become friends and support each other. For example, in many fanfictions, girls from different backgrounds bond over shared interests.
One idea could be a story where a new student arrives at Zodiac Academy with a mysterious power that disrupts the existing power balance among the houses. This could lead to unexpected alliances and rivalries.
One idea could be a new student arriving at Unicorn Academy with a special power that no one has seen before. This could lead to both envy and admiration among the other students.
One idea could be a new student arriving at Asagao Academy and trying to fit in with the different cliques. Another could be a mystery within the academy, like a secret society that the main character stumbles upon. Maybe a love triangle between students from different majors.
One idea could be a new student arriving at Mythos Academy with a mysterious power that no one has seen before. This power could attract the attention of both friends and foes, leading to various adventures as they try to figure out its origin and how to control it.
A great plot for Gotham Academy fanfiction could be a story centered around a school competition that turns out to be rigged. The main characters suspect foul play and start their own investigation. Or perhaps a story where a character from a villain's family enrolls at the academy and has to deal with the prejudice from other students while also trying to prove they're not like their family. Also, a plot about a haunted dormitory at Gotham Academy would be really cool. The students would have to figure out the mystery behind the hauntings.
Here are some ideas. A group of students from the superhero academy could be stranded on a strange planet during a field trip. They have to use their powers in new and creative ways to survive and find a way back home. Or perhaps there's a prophecy about a'special one' among the students who will bring either great glory or destruction to the academy. This leads to a lot of tension and mystery as everyone tries to figure out who it could be.
A more relationship - centered plot could be about two characters who are from rival vampire clans at the academy. They fall in love, but they have to keep it a secret because of the enmity between their clans. They then struggle to find a way to be together without causing a war within the academy.
One idea could be exploring what would happen if a new member joined the Umbrella Academy. Maybe a time - traveling superhero from the future who has knowledge of a great threat coming. Another could be a story where the members lose their powers and have to rely on their wits and teamwork in a completely different way. For example, dealing with a powerful enemy who can nullify powers.