An interesting OC for a Pandora Hearts fanfic could be a detective - like character from another dimension. They have a sharp mind and are used to solving mysteries in their own world. When they arrive in Pandora Hearts' universe, they are intrigued by the strange disappearances and the mystery surrounding the Abyss. Their outsider perspective allows them to notice things that the characters in the original story might have overlooked, and they gradually become an important part of the group trying to solve the overarching mystery of the story.
You could make an OC that is a half - human, half - Chain. This OC would struggle with their identity, being shunned by both humans and Chains. Their story could revolve around finding their place in the world of Pandora Hearts. They might have special abilities that neither humans nor Chains possess, which could make them a target for various factions in the story. They could also form an unlikely alliance with some of the main characters who see their potential and uniqueness.
An interesting Pandora Hearts OC fanfiction idea could be an OC that is a hybrid of a human and a Chain. This OC could struggle with their identity, being neither fully human nor fully a Chain. They could be on a journey to find out where they truly belong. Also, an OC that is a time - traveler who has come to the Pandora Hearts world to prevent a certain catastrophe from happening could make for a great story.
One idea could be a fanfic that focuses on the backstories of the minor characters in Pandora Hearts. For example, exploring the past of some of the servants in the Vessalius household. Another idea is a time - travel fanfic where a character goes back in time to change a crucial event in the Pandora Hearts story. Maybe a fanfic that imagines an alternate ending to the series, where different alliances are formed and different fates await the characters.
One idea could be a crossover where characters from both universes meet in a magical realm. For example, Harry Potter characters could find themselves in the world of Pandora Hearts and have to deal with the strange creatures and the complex power dynamics there. Another idea is a story where the magic systems of both worlds combine in unexpected ways. Maybe a Hogwarts student discovers a Pandora Hearts - style power within themselves.
One idea could be creating an OC who is a keyblade wielder from a forgotten world. This OC could be on a quest to discover the secrets of their world's connection to the greater Kingdom Hearts universe. They might encounter classic characters like Sora and Riku and have to prove their worth as a keyblade wielder.
You could also write a fanfiction centered around a mystery. For example, a strange event occurs in Pandora that only Break and Alice seem to be aware of. They have to work together to solve it, and during the process, their relationship deepens. As they uncover clues and face challenges, their bond becomes stronger, and new aspects of their personalities are revealed.
Another interesting concept is an OC who is a member of an organization that opposes Organization XIII in a different way. Maybe they use magic that is not based on darkness or light, but something in between, which causes them to be shunned by both sides at first.
One interesting Pandora Hearts fanfiction could be about a different take on the relationship between Oz and Alice. For example, a story where they have to face a new, unknown enemy together in a world that's a bit different from the original setting. It might explore their characters more deeply as they struggle against this new threat.
A fanfiction could explore a scenario where the Sharingan in Naruto has a connection to the power of the Pandora Hearts world. Maybe Sasuke discovers that his Sharingan has a hidden ability that is related to the power of the Chains. This could lead to a whole new arc in his character development as he tries to understand this strange connection.
One idea could be an OC who is a keyblade wielder from a long - lost world. They meet Ventus during his travels and join him on his journey to restore the balance in different worlds. This OC could have a unique keyblade design inspired by their home world's culture.
One idea could be creating an OC who is a keyblade wielder from a forgotten world consumed by darkness. This OC could be on a journey to find a way to restore their world while also struggling with the allure of the darkness within them.