France from Hetalia and Lafayette from Hamilton. Since France has a connection to the American Revolution and Lafayette was a Frenchman involved. They could bond over their love for France and their shared interest in the ideals of freedom and revolution. Maybe they would plot some grand new adventures together in the fanfiction world.
Alexander Hamilton and Italy could be an interesting pairing. Hamilton is all about ambition and building a nation, while Italy has his own charm and laid - back nature. Their interactions could be full of contrasts, like Hamilton trying to get Italy to be more serious about important matters.
Italy might be a likely candidate. He is friendly and kind - hearted. His naivete could make Anastasia feel at ease, and his love for food could be something they bond over. For example, he could introduce her to Italian cuisine, which she might find fascinating.
Russia from Hetalia and Kanaya from Homestuck could be a really unique pairing. Russia has his own mysterious and somewhat intimidating aura, and Kanaya is very poised and has her own set of skills, especially when it comes to fashion and fighting. Their interactions could be quite interesting, like Russia showing Kanaya some of his traditional Russian crafts and Kanaya showing Russia how to make some really cool Homestuck - inspired outfits. Additionally, China from Hetalia and Jade from Homestuck could be a great pair. China with his long history and Jade with her connection to nature and her rather innocent yet powerful nature could create some really engaging storylines.
One more interesting pairing could be Undertaker and America. Undertaker's mysterious and somewhat macabre nature against America's bold and brash attitude. America might be curious about Undertaker's strange hobbies and Undertaker could be intrigued by America's naivete and strong sense of justice. It would be fascinating to see how they interact, whether they become friends or end up at odds with each other. Also, Mey - Rin and Japan could have an interesting dynamic. Mey - Rin's clumsy but kind - hearted nature and Japan's reserved and traditional ways could lead to a unique relationship where they learn from each other.
I think Ron and Prussia would make a great pair. Ron has his insecurities but also his loyalty and humor, and Prussia has his pride and bravado. They could start off not getting along, but then find common ground as they face challenges together. Also, Luna Lovegood and Japan could be an interesting combination. Luna's unique view of the world and Japan's more reserved and traditional nature could lead to some really unique conversations and adventures.
Zero and Ruby would be a likely pairing. Zero is a powerful and skilled fighter, and Ruby has a lot of potential and a unique weapon. They could learn from each other's combat styles. Ruby could learn about Zero's more serious and battle - hardened approach, while Zero could be inspired by Ruby's enthusiasm and creativity in fighting.
I think Ruby and a young, adventurous Pilot would make a great pairing. Ruby's enthusiasm and eagerness to learn new things would mesh well with a Pilot's daredevil nature. They could exchange stories about their respective worlds while fighting side by side.
I think Anzu and Sakura would make an interesting pair. They are both strong - willed female characters. Anzu could introduce Sakura to the world of Duel Monsters, and Sakura could teach Anzu some basic ninja self - defense techniques. They could bond over their shared experiences of being friends with the main male characters in their respective series and also support each other in their own personal growth.
Shadow the Hedgehog and Cerebella would be a fascinating match - up. Shadow's brooding and mysterious nature could be intrigued by Cerebella's confident and somewhat flamboyant fighting style. They might start off as rivals, constantly trying to outdo each other in combat, but gradually come to respect each other. Shadow could learn to be a bit more open from Cerebella, while Cerebella could learn the value of Shadow's more strategic and calculated approach to battles.
Alucard and Dean Winchester would be an interesting pairing. Alucard's dark and brooding nature, combined with his overpowering abilities, would contrast with Dean's more impulsive and human - centered approach.