Well, Gateau could be paired with a tough, no - nonsense character. Gateau's flamboyant style and the other character's more serious demeanor would create a great dynamic. They could have some hilarious banter while also being a formidable team in combat. Also, Tira could be paired with a character who has a very different moral code. Tira's innocence and the other character's more jaded view of the world could lead to some interesting character development for both as they influence each other throughout the story.
Neptune and Sora from Kingdom Hearts would make an interesting pair. Neptune's carefree and fun - loving nature could contrast well with Sora's more heroic and determined personality. They could go on an adventure together, with Neptune showing Sora the wacky and unique aspects of the Gamindustri world while Sora teaches Neptune about the different Disney - inspired worlds he has visited.
Shirou from Fate and Kiba from DxD could team up. Shirou's selfless desire to protect others combined with Kiba's sense of justice as a former Exorcist turned Devil would make them a formidable duo. They could share their combat techniques and learn from each other while fighting against the various threats that lurk in a world where the two universes have collided.
If crossed with Buffy the Vampire Slayer, Buffy and Rose would make a formidable pair. They both have a no - nonsense attitude when it comes to fighting vampires. They could bond over their shared experiences of protecting others. And Spike from Buffy could be paired with some of the more edgy vampires from Vampire Academy. Their different takes on being a vampire could lead to some intense and humorous interactions.
Gandalf and a wise old dragon. Gandalf could exchange magical knowledge with the dragon. The dragon might offer its insights on ancient magic, and Gandalf could teach the dragon about the different forms of magic in Middle - earth. They could also work together to solve some big problems in both worlds.
One idea could be that the Sorcerer Hunters are transported to a different magical realm from another series. There, they have to team up with the local heroes to fight a common enemy, a powerful sorcerer who is trying to take over both worlds. Another plot could involve a character from the crossover series coming to the Sorcerer Hunters' world and getting caught in the middle of their fight against sorcerers, causing chaos as the Hunters aren't sure if they can trust this new arrival.
In a crossover with 'Naruto', Soma could be paired with Naruto. Naruto's love for ramen could lead to some interesting interactions with Soma's cooking skills. They could have a friendly cooking competition where Naruto tries to use his ninja skills to enhance his cooking speed. Another interesting pairing could be Erina with Sakura. Sakura could learn about high - class cooking from Erina while Erina could be impressed by Sakura's medical knowledge which could be applied to food science in some ways.
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.
The Arbiter and Thor. Thor is a powerful Asgardian with his hammer and lightning powers, while the Arbiter is a skilled warrior from the Halo universe. They could fight side by side against a common enemy. Their different cultures and fighting styles would make for an exciting combination. Maybe Thor could teach the Arbiter about magic, and the Arbiter could show Thor some unique Covenant combat techniques.
Amu could be paired with Naruto from Naruto. Amu's shy yet strong - willed nature combined with Naruto's determination would make for an interesting dynamic. They could learn from each other's ways of facing challenges, with Amu teaching Naruto about the importance of inner self - discovery and Naruto showing Amu how to be more bold in the face of danger.
Ruby and Joker could be a great pairing. Ruby's enthusiasm and determination combined with Joker's cool - headed leadership skills would make for an interesting dynamic. They could learn from each other's combat styles and ways of thinking.