One great Persona 3 male OC fanfiction is 'The New Transfer Student'. It has an interesting male OC who brings a fresh perspective to the story. His interactions with the existing characters are really engaging.
First, you need to create a well - rounded male OC. Give him unique traits, like a special hobby or a distinct personality quirk. For example, he could be really into old - school music and that could be something that sets him apart.
One common theme is self - discovery. The male OC often has to figure out who they are in the context of the Persona world. For example, they might discover hidden powers or a new purpose in life.
One key aspect in creating a male OC for a Persona 5 fanfiction is to give him a unique backstory. For example, he could be an exchange student from a foreign country with a troubled past that led him to Tokyo. This would add depth to his character and also provide opportunities for interesting interactions with the existing Persona 5 characters.
Maybe the OC has a special power in the TV World. Yukiko, being part of the Investigation Team, is intrigued by this. They embark on adventures together within the TV World, fighting Shadows side by side. Their relationship could develop from a simple acquaintance to a deep friendship. And along the way, the OC might teach Yukiko some new ways to use her Persona, leading to some interesting battles and character growth for both of them.
A male oc who is an undercover detective sent to Inaba to investigate the strange disappearances could also be a great idea. He would have to balance his real identity and mission with fitting in with the group of Persona users. His detective skills could come in handy during dungeon exploration and solving the mysteries behind the Midnight Channel.
The architecture in Persona 5 is also very distinct. Your male OC could have a special connection to a particular location in the game, like Leblanc coffee shop. Maybe he works part - time there and has some interesting conversations with Sojiro. This would help to ground him in the game's environment.
One more to recommend is 'A Male OC in the Persona Realm'. In this fanfiction, the male OC has to deal with the complex politics and power struggles within the Persona world. The author does a wonderful job of painting a vivid picture of this world and making the male OC's story an integral part of it. It's a must - read for any Persona fanfiction lover.
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.
In some persona 4 oc fanfiction, an OC might be a detective who is secretly investigating the strange happenings in Inaba. This OC could have their own set of skills and resources, and as they dig deeper, they discover connections between the real world and the TV world that the main characters haven't noticed yet. Their investigations could also put them in danger and lead to some intense action scenes.