A cool pairing would be Corrin from Fire Emblem Fates and Makoto Niijima from Persona 5. Corrin has a complex backstory and the ability to transform, while Makoto is intelligent and has a strong sense of justice. They could work together to solve problems in both their worlds. Also, the contrast between Corrin's more fantastical abilities and Makoto's more down - to - earth detective skills would be fascinating. Additionally, Ike from Fire Emblem and Akira Kurusu from Persona 5 would be great. Ike is a powerful warrior, and Akira is a strategic thinker. They could learn a lot from each other in combat and in dealing with their respective foes.
Ruby and Marth could be an interesting pairing. Ruby is young and full of energy with her scythe skills, while Marth is a noble and skilled leader. Their different leadership styles could create an interesting dynamic. Ruby could learn about more strategic leadership from Marth, and Marth could be inspired by Ruby's bold and fearless approach to combat.
Chie Satonaka from Persona 4 and Ann Takamaki from Persona 5. They both have strong personalities and are very passionate about their causes. Chie with her love for kung - fu and Ann with her modelling career. They could bond over their determination and share their combat skills and life experiences with each other. It would be fun to see how they interact in a crossover scenario.
Yu Narukami and Joker would be an interesting pairing. Yu is the calm and collected leader of the Investigation Team, while Joker is the charismatic leader of the Phantom Thieves. They could exchange ideas about leading their respective groups and how to deal with the Shadows. Their different fighting styles and Persona abilities could also make for some great team - up moments in battle.
Yukari (from Persona 3) and Chie (from Persona 4). Yukari is very outspoken and has a bit of a sarcastic side, while Chie is energetic and a bit of a tomboy. Their different personalities could lead to some really fun and comical interactions, especially when they're facing Shadows together or just hanging out in the school setting.
Ragna from Blazblue and Ruby from RWBY could be an interesting pairing. Ragna is a brooding anti - hero with a powerful combat ability, while Ruby is an optimistic and energetic young huntress. Their different personalities could lead to some great character interactions, like Ragna being a bit cynical at first but slowly being influenced by Ruby's positive attitude. Another interesting pairing could be a Persona user, say Yu from Persona 4, and Jin from Blazblue. Jin is a cold and reserved swordsman, and Yu could use his empathetic nature and Persona powers to try to break through Jin's icy exterior. And for a third pairing, Blake from RWBY and a Persona user like Akechi from Persona 5. Blake has her own secrets and a complex past, and Akechi's dual nature could create an interesting dynamic as they both have things they are hiding.
Kakashi from Naruto and Captain Obi from Fire Force would be an exciting duo. Both are experienced leaders. Kakashi's calm and strategic mind could work well with Captain Obi's more straightforward and action - oriented leadership. They could collaborate in planning battles against common threats in the 'naruto x fire force fanfiction' world, sharing their different combat and strategic knowledge.
Makoto Naegi from Danganronpa and Yu Narukami from Persona. Makoto's determination and leadership skills could pair well with Yu's calm and collected nature. They could work together to solve the mysteries that occur when their worlds collide.
Ruby and Yu Narukami. Ruby is young and full of energy, always eager to fight for what's right. Yu is a calm and collected leader. Their different personalities would make for an interesting dynamic. Ruby could learn from Yu's more methodical approach to problem - solving, while Yu could be inspired by Ruby's unwavering determination.
Akira and Minato would be an interesting pairing. Akira, with his leadership skills as the leader of the Phantom Thieves, and Minato, the protagonist of Persona 3, could share their strategies in combat and dealing with the Metaverse. They both have different experiences with their respective groups, so they could learn a lot from each other.
Definitely Ghost Rider and Shinra. Shinra's Adolla Burst and Ghost Rider's hellfire powers would make for an exciting combination. They could have some epic battles together against powerful foes. Also, Shinra's determination to find out the truth about his family and the world of Fire Force could be complemented by Ghost Rider's search for justice in his own world.