One good storyline could be an OC who is a new transfer student at Gekkoukan High School and quickly catches Mitsuru's attention due to their unique abilities in the Dark Hour. The OC could initially be a bit of an outcast but gradually forms a strong bond with Mitsuru as they work together to face Shadows. Another idea is a fanfiction where the OC has a special connection to Mitsuru's family history, perhaps uncovering secrets that were long forgotten and helping Mitsuru come to terms with her heritage. There could also be a storyline where the OC is from a rival organization but ends up falling for Mitsuru and has to choose between loyalty to their group and their new - found feelings.
To write a compelling OC in relation to Mitsuru, first, give the OC a distinct personality. For example, if Mitsuru is more reserved and serious, the OC could be outgoing and humorous to create an interesting dynamic. Also, give the OC a unique backstory. Maybe they grew up in a different country or had a special encounter with a Persona at a young age that shaped their abilities. Their goals should also be clear, whether it's to become a strong Persona user like Mitsuru or to find a way to end the Dark Hour once and for all.
You can try fanfiction websites like Archive of Our Own (AO3). It has a large collection of fan - created works, and you're likely to find some great 'persona 3 mitsuru x yukari fanfiction' there. Just use the search function to look for it specifically.
One great story could be about their friendship evolving into a deeper understanding during a difficult mission in Persona 3. They might start to rely on each other more than ever, realizing how much they value one another's skills and personalities.
One popular Mitsuru Sanke fan fiction might be those that explore his backstory in more detail. Maybe it delves into his childhood and how it shaped him into the character he is. Another could be a fan fiction where he has a unique adventure that wasn't part of the original story, like traveling to a mysterious new land. And there could also be fan fictions that focus on his relationships, whether it's his friendships or potential romantic interests.
One great Yukari x Mitsuru fanfic could be 'Bond of the Two'. It beautifully explores their relationship with well - written dialogues and character development. It delves into how they support each other during tough times at their school. Another interesting one is 'Yukari and Mitsuru: A Different Path' which takes a unique approach in showing their friendship evolving into something more. It has a great plot that keeps you engaged from start to finish.
Perhaps the fanfiction focuses on the cultural clash between the two groups. The Persona 4 characters are from a small town, while the Persona 5 crew is from the big city. Their different ways of handling things and their unique Personas could lead to some interesting interactions. For example, Yu and Joker might have different leadership styles that they have to reconcile in order to succeed against the shadows.
Well, starting a Mitsuru Sanke fan fiction requires a good understanding of the source material. Read up on all the available information about him. Then, consider the genre you want to write in. Do you want it to be an action - packed adventure, a heart - warming romance, or a mystery? Based on that, develop your plot. For example, if it's a mystery, create a puzzling situation for Mitsuru Sanke to solve. As you write, try to keep his character consistent with the original, while still allowing room for growth and development within your fan fiction.