Sousou could be very interesting as well. Given her intelligence and ambition in Koihime Musou, in a crossover with a science - fiction world, perhaps one with advanced technology and space exploration, she could be trying to use the new resources and knowledge for her own gain or for the betterment of her people. She would be constantly scheming and trying to outwit the other characters in this new and unfamiliar setting.
Ryofu is also a great choice. She has a wild and unpredictable nature. If she were in a crossover with a detective - themed story, like 'Sherlock Holmes', she could be either a suspect or an ally. Her unorthodox methods and fierce fighting style would add a lot of chaos and excitement to the story.
One idea could be a crossover with a popular fantasy series like 'The Lord of the Rings'. The characters from Koihime Musou could find themselves in Middle - earth, perhaps having to deal with the threat of Sauron. They could bring their own unique fighting styles and powers to the new world.
Chiaki Nanami could be an excellent choice. She is the Ultimate Gamer, so if you cross her with a digital or virtual world, there are so many possibilities. She could use her gaming skills to navigate through a new digital realm, like a Matrix - like world. Her calm and intelligent nature would also make her a great character to lead the group in a crossover situation. She could figure out the rules of the new world quickly and help the others adapt.
Ross could be really interesting. Since he's an archaeologist, in a crossover with a show like 'Indiana Jones' (in a fanfiction sense), he could go on an adventure with Indiana Jones. Ross would bring his academic knowledge while Indy would have the practical experience. Their interactions would be filled with Ross trying to over - analyze everything and Indy just wanting to get the job done.
Raphael could be really interesting. In the 2003 version, he is hot - tempered and tough. In the 2012 version, he also has a strong personality. Seeing how he reacts to his counterpart and how they might either clash or bond could be a great focus. Maybe they have a friendly rivalry as they compare their fighting skills.
Sinon from Ggo could also be very interesting. If she were to enter Sao, her sniper skills might translate in unexpected ways. She could be paired with characters from Sao and learn new combat techniques while also teaching them about the precision of long - range attacks.
Naruto himself would be very interesting. His energetic and determined personality would make for great adventures in the GTA world. He would probably approach the chaos and crime of GTA with his usual enthusiasm, trying to bring justice in his own ninja - way. His ability to make friends easily could also lead to some interesting alliances with GTA characters.
I think Naruto himself would be very interesting. His never - give - up attitude and his powerful jutsu would make for great interactions in the Titanfall universe. He could befriend Pilots and learn about their technology while also showing them the power of ninja skills.
Frisk could be a very interesting character to focus on. Frisk has the power of determination, which could be used in unique ways in the FNAF setting. They could befriend some of the animatronics, using their kindness and determination. Also, since Frisk is the player - controlled character in Undertale, it would be interesting to see how they adapt to the more dangerous and unpredictable world of FNAF.
I think Naruto himself would be really interesting. His positive attitude and strong will would contrast greatly with the cynical world of The Boys.
I think Clary from Shadowhunters would be really interesting. She's a strong - willed and powerful shadowhunter. If she were to cross paths with the Twilight characters, her inquisitive nature would lead her to try and understand their world. And her skills as a shadowhunter could be put to the test when dealing with the vampires and werewolves in Twilight.