One idea could be to make Prince Charming an out - of - character type. For example, instead of being the perfect, charming prince all the time, he has a clumsy side that only the OC (original character) gets to see. Maybe he trips over his own feet when he's nervous around the OC.
You could also create an OC who is a mage in training at one of the magical academies in the 'The Dragon Prince' world. This OC might be a bit of an outcast because they are interested in a type of magic that is considered unconventional. Their journey could involve trying to prove the value of their chosen magic while also dealing with the typical school - related dramas and rivalries.
Well, a plot idea could be that Cinderella and Prince Charming have a big fight right after their wedding. Maybe Cinderella feels suffocated by the royal life and Prince Charming doesn't understand her at first. But then they go on an adventure together outside the kingdom and rediscover their love. Another idea is that there's a curse on Prince Charming that makes him turn into a beast at night. Cinderella has to find a way to break the curse while still loving him in his beastly form. Also, we could have a story where Cinderella is kidnapped by an evil witch who wants Prince Charming for herself. Prince Charming has to rescue Cinderella and prove his love is true.
The OC could be a time - traveler who lands in the Code Geass world and meets the prince. As she tries to find her way back home, she accidentally creates a harem situation. There could be a knight who is sworn to protect the prince and starts to have feelings for the OC because of her strange knowledge from the future, and a foreign princess who sees the OC as a way to form an alliance with the prince.
Well, a plot could be that Prince Charming and Snow White are actually from two different kingdoms that are at war. They meet and fall in love in secret. They then try to find a way to end the war between their kingdoms so they can be together. Also, there could be a plot where Snow White is cursed not just with the poisoned apple, but also with a spell that makes her forget Prince Charming. Prince Charming has to find a way to break both curses.
One interesting plot twist could be that Cinderella is actually a powerful sorceress in disguise. She has been hiding her powers all along, and when she meets Prince Charming, she uses her magic to save the kingdom from a greater threat instead of just relying on his rescue. Another could be that Prince Charming has a secret identity as a commoner who sneaks out of the palace often. When he meets Cinderella, he realizes they have more in common than he thought. A third plot twist might be that the glass slipper was actually a test by an evil witch, and Cinderella was the only one who could pass it because she has a pure heart that can break the witch's spell on the prince.
One idea could be that the OC is a new composer at the school and catches the attention of one of the princes while they're all competing for a major music project. The OC has a unique style that challenges the traditional methods of the princes.
One idea could be a male OC who is a talented but shy songwriter. He joins the school and has to overcome his shyness to collaborate with the Uta no Prince sama characters. Maybe he has a unique musical style that challenges the traditional styles in the school.
One idea could be creating an OC who has a unique power related to time manipulation. They could be from a different dimension and end up in the Avengers' world. Another idea is an OC who is a master of ancient magic and teams up with Doctor Strange within the Avengers group. Maybe an OC that is a super - intelligent android created by a villain but has a change of heart and joins the Avengers.
You could create an OC for your Persona OC fanfiction who is an artist. This artist OC could use their art as a way to understand and even manipulate the Metaverse. For example, they might draw scenes from the Metaverse that give clues about upcoming events or hidden locations. Their art could also be a form of therapy for other characters who are struggling with their dual lives in the real world and the Metaverse.
Perhaps an OC who is a half - human, half - beast creature. This OC could struggle with acceptance in both the human and beast - kin societies. They end up meeting the main characters during their adventures and learn to embrace their unique identity with the help of the group, while also adding their own combat skills, which are a blend of human strategy and beast - like strength, to the team.