What are some interesting plot ideas for Frankenstein x OC fanfiction?

One idea could be that Rai, with his unique powers, somehow stumbles upon the re - animated creation of Frankenstein. They initially see each other as threats but gradually come to understand that they both are outcasts in a way. Rai could use his powers to help Frankenstein's creature control his more violent tendencies. Another plot could involve them teaming up against a common enemy, like a mad scientist who wants to use both of them for his own evil experiments.

Maybe the OC is a scientist who has developed a device that can temporarily steal The Flash's speed. At first, the OC uses it for personal gain, but then realizes the chaos it's causing in the city. They then team up with The Flash to take down other villains who are after the device. Or, the OC could be a meta - human with the ability to see the future in flashes. The Flash initially doesn't trust the OC, but as they start to have the same visions, they have to work together to prevent a major disaster from happening.

The OC could be a psychic who is unknowingly drawn to Derry because of Pennywise's presence. Their psychic powers allow them to sense Pennywise's energy but not fully understand what it is at first. As Pennywise tries to manipulate the OC, the OC starts to fight back using their psychic abilities, creating a battle of wills and powers that could span across different dimensions within Derry, from the sewers to the abandoned houses and the mindscapes of both characters.

The OC could be a researcher studying digimon behavior. Renamon becomes the subject of the study. At first, Renamon is very guarded around the OC. However, as the OC shows genuine respect for Renamon and her kind, Renamon begins to open up. They then embark on a journey to discover more about the history of digimon, with their relationship growing stronger along the way.

Well, an interesting plot could involve an OC that is a transfer student, just like the protagonist. But this OC has a hidden past related to the Metaverse. Maybe they were experimented on by a shadowy organization in their home country, and this gives them a different perspective on the Metaverse compared to the Phantom Thieves. Their goal could be to find out who was behind those experiments and get revenge. Along the way, they form a bond with the group and learn new ways of using their powers.

One idea could be that the OC is a new Keyblade wielder who meets Ventus during his training. They start as rivals, constantly competing in battles and challenges. But as they face a powerful enemy together, they realize their combined strength and start to develop feelings for each other.

Maybe the OC is a time - traveler who accidentally lands in Obito's time. She knows about his future actions but instead of trying to stop him right away, she tries to understand his pain. This leads to a complex relationship where Obito is both intrigued and afraid of her knowledge.

One idea could be that the OC is a vampire hunter who initially sets out to destroy Dracula but ends up falling in love with him. Their relationship could be a struggle between her duty and her new - found feelings.

One idea could be that the OC is a new player in the game who gets accidentally transported to the world where Momonga is. Momonga, being curious about this strange new entity, decides to keep the OC close. They then embark on adventures together, with the OC showing Momonga different perspectives from a normal player's view.

One idea could be that the OC has a special power that can either control or resist Hichigo's Hollow powers. This creates a dynamic where they are constantly testing each other's limits.