Well, an interesting plot could be Rachel getting stranded in a time - displaced area of the BlazBlue world. She has to find a way to get back to her own time while also dealing with the strange events and characters she encounters in this new situation. Another idea is that she participates in a tournament not for the sake of winning, but to find a certain person or object that is crucial for something important in her life.
A plot could revolve around Rachel's past. Maybe she discovers something about her family or her own origin that she didn't know before. This could lead to a journey of self - discovery. Or perhaps she has to deal with a threat to her kingdom that requires her to use both her wits and powers. For example, an ancient evil awakens and she has to gather allies and find a way to defeat it while also protecting her people.
One idea could be that the main character, a new fighter in the BlazBlue universe, suddenly finds himself surrounded by various female characters who are all intrigued by his unique fighting style. They start to vie for his attention, leading to comical and heartwarming situations.
Maybe a fanfic where Jubei takes on a young apprentice. This could show his mentoring side and how he imparts his knowledge and skills. You could include scenes of training, as well as the apprentice getting into trouble and Jubei having to rescue them, all while teaching important life lessons.
One idea could be a crossover with another popular fighting game series like Street Fighter. Characters from both universes could meet in a strange dimension and have to battle it out to find a way home. For example, Ragna from BlazBlue and Ryu from Street Fighter could have an epic showdown.
How about a plot where they are both lost in a magical forest? They have to rely on each other to find their way out. Along the way, they discover secrets about each other that they never knew. Or they could be in a modern - day Romeo and Juliet situation where their families are in business competition, but they fall in love secretly. There are so many possibilities when it comes to writing fanfic about Adam Brody and Rachel Bilson.
One idea could be that Rachel discovers a new prophecy that only she can decipher, and she has to team up with Percy to stop a new threat to the demigod world. This would put their relationship to the test as they face dangerous monsters along the way.
A possible plot could be that there is a strange energy disturbance that starts to merge the three universes together. Characters like Ragna from Blazblue, the Persona users, and Team RWBY find themselves in a strange new world that is a mix of all three. They must figure out what is causing this and how to stop it. Maybe there are also new enemies that are created from the combination of the different mythologies and technologies of the three universes. For instance, Grimm with the ability to use Persona - like powers or Blazblue - style Ars Magus. It would be a great opportunity for character development as they learn to work together despite their differences.
Perhaps a fanfiction where Terumi loses his powers and has to rely on his wits and the help of some unlikely allies. He could start to see the world from a different perspective without his powers, leading to character growth.
Another plot could be set in a post - high - school world. Maybe they both end up in the same college. Rachel is trying to make a name for herself in a new environment, and Young Do is still dealing with his own insecurities. They cross paths in a campus event, and it reignites their old connection. They could then support each other through various college - related challenges like exams and social drama.
One plot idea could be that Rachel and Will collaborate on a very unique musical production. They face challenges like budget cuts and a lack of student interest at first. But through their combined efforts and Rachel's determination and Will's teaching skills, they manage to turn it around and create a show that wows everyone.
One idea could be that they face challenges in their married life due to their different career aspirations. For example, Rachel might get a big Broadway opportunity that requires her to be away from home a lot, and Jesse has to deal with his own teaching job at the local school. They have to figure out how to support each other while still chasing their dreams.