One idea could be a new banshee oc who discovers her powers during a full moon and has to deal with the chaos in Beacon Hills. She could befriend Scott and his pack and use her unique abilities to help them fight off new threats.
A possible plot could be that the OC is a time - traveler who accidentally lands in the Teen Wolf universe. The four mates are drawn to the OC because of their unique knowledge of future events. However, changing the future might have unforeseen consequences. The OC has to balance their relationships with the mates and figure out a way to return to their own time without disrupting the fabric of the Teen Wolf world too much.
You can also make her powers different in some way. Instead of just screaming when she senses death, she could also create a sort of sonic shield to protect herself and others. Her connection to the spirit world could be stronger too. She might be able to communicate with the dead more directly, not just sense their presence. And for her character arc, she could start off as someone who is afraid of her powers but over time, she learns to master them and use them for good.
One idea could be that the characters from Teen Wolf end up in the Fate universe and have to deal with the complex magic system there. For example, Scott could try to use his werewolf abilities to control the powerful magical forces in Fate. Another could be a love story where a character from Teen Wolf falls in love with a Fate character, like Stiles falling for a Fate mage. Maybe the Teen Wolf pack has to fight against a common enemy in the Fate world, something that combines the bestial nature of the werewolves with the magical threats of Fate.
One idea could be an OC werebear who is trying to hide their identity in the Teen Wolf universe while also dealing with the normal high school drama. For example, they might be worried about accidentally shifting during a big event like a school dance or a sports game.
One idea could be an OC with unique powers that disrupt the team's dynamics at first. For example, an OC who can manipulate time in small increments but doesn't have full control yet, causing accidental glitches during battles. Another could be an OC from a different dimension who has to learn the ways of the Teen Titans' world. Maybe they have a completely different set of values and powers based on their home dimension.
Another plotline could be the male oc having a special power that others don't. This power might attract the attention of both good and bad forces in the Teen Wolf world. For instance, he could have the power to control the elements, and different factions would either want to use him or destroy him. This leads to a lot of action - packed sequences.
One idea could be creating an OC with a unique power like the ability to control time in small increments. This OC could be from a different dimension and end up joining the Teen Titans by accident. Their time - controlling power could cause all sorts of chaos and interesting plot twists as they learn to control it and use it for good.
A mystery - themed 'the oc fanfic' would also be great. Maybe there's a mystery surrounding the Cohen family's wealth or a long - lost relative that suddenly shows up with a hidden agenda. The characters would have to work together to solve the mystery, and in the process, their relationships would be tested and new alliances formed.
One idea could be exploring an OC's (Original Character) journey to become a leader within the 100's post - apocalyptic world. They could start as an outcast and through their unique skills, like advanced medical knowledge or exceptional hunting abilities, gain the respect of different factions.
One idea could be that the 6teen characters are trapped in a shopping mall during a zombie apocalypse. They have to use the resources in the mall to survive while also avoiding the zombies. Another could be that one of the characters gets bitten but tries to hide it from the others for as long as possible.