Claude and Luna Lovegood would make an interesting pair. Claude is a very curious and adaptable character, and Luna is known for her unique perspective and ability to see things others can't. Together, they could explore the mysteries of both the wizarding world and the world of Fire Emblem: Three Houses. Claude's strategic thinking combined with Luna's intuitive knowledge could lead to some unexpected and creative solutions to problems they encounter in the crossover fanfic.
One idea could be that the characters from Fire Emblem: Three Houses are magically transported to the wizarding world of Harry Potter. They could be sorted into Hogwarts houses based on their personalities. For example, Edelgard might be a Slytherin as she is ambitious and a natural leader. Then they could learn magic and help the students of Hogwarts in a battle against a new dark wizard threat, using their unique combat skills from their own world in combination with magic.
I think Harry and Akane would be an interesting pair. Harry has his own set of challenges dealing with Voldemort and the wizarding world, and Akane has to deal with Ranma's antics. They could share their experiences of having someone important in their lives who can be a bit of a handful. And they could also learn from each other's fighting styles, Harry with his magic and Akane with her martial arts.
Ron and Jacob could be a fun pair. Ron is a bit of a food - loving and sometimes clumsy character, while Jacob is a hot - headed werewolf. They could start off bickering but then end up becoming friends. Ron could introduce Jacob to some of the delicious wizarding treats, and Jacob could show Ron how to embrace his more wild side in a different way than magic allows.
Definitely Harry and Aslan. Harry has always been the hero in the fight against Voldemort, and Aslan is the great lion, the savior of Narnia. Their meeting would be full of wisdom exchange. Harry could learn from Aslan's all - knowing and powerful nature, and Aslan might be interested in Harry's ability to resist the Dark Arts.
Another great pairing could be Harry and Sasuke. Both have a dark side they struggle with. Harry has the connection to Voldemort and Sasuke has his thirst for revenge. They could bond over their internal battles and learn from each other's experiences. Harry could teach Sasuke about the importance of friendship in the fight against evil, and Sasuke could show Harry some advanced combat skills.
Dumbledore and Carlisle Cullen would also be a fascinating pair. Dumbledore is a wise and powerful wizard, and Carlisle is an old and moral vampire. They could have deep discussions about life, death, and the responsibilities that come with their powers. They might also collaborate to find solutions to problems that affect both their worlds.
Pairing Supergirl with Severus Snape could create a really dynamic relationship. Snape has his own dark past and complex personality. Supergirl could potentially see the good in him and try to bring it out. They could have a bit of a clash at first, with Snape being suspicious of her, but over time, they could develop an unlikely friendship or at least a mutual respect as they face common enemies in the wizarding world.
I think pairing Dobby the house - elf with Tinky Winky could be really interesting. Dobby is always so eager to please and do good, and Tinky Winky has his own unique charm. They could go on adventures together in Hogwarts or in the Teletubbies' land.
I think Harry Potter and Percy Jackson themselves would be the most interesting pair. Their different backgrounds and abilities would create a great dynamic. Harry is used to a world of wizards, magic wands, and spells, while Percy is all about his demigod powers and the world of Greek gods. They would have a lot to learn from each other and their combined efforts would be really exciting to read about.
Definitely Buffy and Harry. They are both the main heroes in their respective stories. Buffy's physical combat skills and Harry's magical abilities would make for a great combination. They could learn a lot from each other and face challenges together.