Lann and Reynn are obvious choices. They are the main characters in World of Final Fantasy and can serve as the link between different crossover worlds. Their ability to capture and use mirages makes them versatile in different settings.
Gilgamesh is a fan - favorite character. His over - the - top personality and his penchant for collecting powerful weapons would add a lot of humor and action to a crossover fanfiction. He could be on a quest to collect the most powerful items from the crossover world as well as his own.
Shantotto is also a great character to include. She's a powerful mage in the Final Fantasy universe. In a crossover, she could use her magic to either help or cause trouble depending on the situation. For example, if crossed with a steampunk - themed world, she might be intrigued by the new technology but also try to impose her magical ways on it.
Definitely Pikachu. Pikachu is one of the most recognizable Pokémon, and having it interact with Arceus in a crossover would be really cool. It could be like a small, cute Pikachu following around the all - powerful Arceus.
Ink!Sans is a popular pick. His creative and somewhat unpredictable nature can bring a lot of color (literally and figuratively) to a Glitchtale crossover. He could use his paint powers in the Glitchtale world in ways that no one expects. Also, Bete Noire from Glitchtale is a character that many fans like to include. Her relationship with other characters, especially her sister, can be explored in new and interesting ways when in a crossover situation.
The Nurse is also great for crossovers. Imagine her in a world like Final Fantasy. She could use her healing abilities to help the party members. And then there's the Goblin Tinkerer. If he was in a Portal crossover, he might be interested in the advanced technology there and try to tinker with it, creating some interesting and comical situations.
Definitely Yu Narukami. He's the main character in Persona 4 and his leadership and strong Persona abilities make him a great addition to crossovers. Yosuke Hanamura is also popular. His comical nature and loyalty can add some humor and heart to the story. Chie Satonaka is another one. Her martial arts skills and determination are great traits in crossovers.
One popular character to include is Batman from DC Comics. The contrast between Batman's detective skills and gadgets and Raiden's superhuman powers would be fascinating. Another is Goku from Dragon Ball. Goku's love for fighting and his ability to reach new levels of power could lead to some epic battles with Raiden. And of course, Samus Aran from Metroid. Samus' armored suit and her exploration of alien worlds could be combined with Raiden's adventures in a unique crossover story.
Itachi from Naruto is also a popular choice in these crossovers. His complex character and powerful abilities can be really interesting when combined with the world of Final Fantasy 8. He could be seen as a mysterious figure in the FF8 world, perhaps even having some connection to the sorceresses. And of course, characters like Naruto and Zell from FF8 can have some fun interactions too, with their different fighting styles and personalities.
The protagonist of the main Megami Tensei games, like the Demi - Fiend from Shin Megami Tensei III, is also a great choice. His unique backstory and abilities can add depth to any crossover story. He can bring his demon - slaying skills and knowledge of the Megami Tensei world into a new setting.
Jace Wayland is another great character. His charm and combat skills can add a lot to a crossover story. In a crossover with the Lord of the Rings, he could be seen as a kind of ranger, using his Shadowhunter skills to navigate Middle - earth and fight against the forces of Sauron.
If we consider a crossover with a superhero universe, characters like Superman could be interesting. His strength and moral code combined with the alpha stigma concept could create a really unique dynamic. He could interact with characters having alpha stigma in ways that test his own powers and beliefs.
Engineering characters from the Katana Fleet can also be great inclusions. They can use their technical knowledge to help or hinder the situations in the crossover. Maybe they have to fix a crucial piece of technology from the other series' world, or they might accidentally cause a problem while trying to adapt their own technology to the new environment.