A good way is to put them in a situation where their unique skills from their different backgrounds are required. Harry can use magic to create distractions while Edward uses his speed and strength to physically combat an enemy. This way, they complement each other.
You can also blend their backgrounds by having them exchange knowledge. Harry can teach Edward about the wizarding culture and magic spells, and Edward can share with Harry about vampire lore and how to survive in a world full of supernatural threats. This exchange can create a bond between them and blend their two very different worlds.
A good way is to focus on their shared traits. Both Harry and Daryl are survivors. Harry has survived Voldemort's attacks and Daryl has survived the zombie apocalypse. So, in fanfiction, they can bond over their experiences of facing tough odds. For instance, they could exchange stories of loss and how they overcame it.
Well, Merida comes from a medieval - like Scottish setting with a strong sense of tradition and magic. Macintosh, on the other hand, is often associated with a more modern or technological world. To blend their backgrounds, the author could have Merida discover a magical portal that leads her to Macintosh's world. There, she could be amazed by the strange machines and new ways of doing things, while Macintosh could be intrigued by her primitive yet powerful magic and her way of life. They could then exchange knowledge and skills, forging a connection between their two very different worlds.
To blend the two universes well, you could start by establishing some common ground. For example, both have elements of mystery and danger. You could have the magic from the Harry Potter universe interact with Slenderman's spooky abilities. Maybe Slenderman's presence distorts the magic around him in Hogwarts, causing strange things to happen. Another way is to introduce a crossover object or character that belongs to both worlds in a way.
Well, you can start by finding common traits. Both are young leaders in their own ways. Harry leads his friends at Hogwarts in their battles against Voldemort, and Ciel leads his servants in his fight against those who wronged him. So, a story could be built around them sharing leadership strategies.
Well, one way is through events. Maybe there's a charity event that combines acting and dancing. This would be a great opportunity for their worlds to collide. They could be paired up for a performance piece, which would force them to interact and understand each other's crafts better.
Galen Marek was trained by Darth Vader, so he has a connection to the dark side, while Ahsoka Tano was a Jedi Padawan. In a fanfiction, their different backgrounds can be blended by having them teach each other. For example, Galen could show Ahsoka some of the more aggressive combat techniques he learned, which she could then adapt to her own fighting style. And Ahsoka could teach Galen about the Jedi code and how to use the Force for good. This exchange of knowledge could create an interesting dynamic in the story.
A simple way is to have Bruce Banner be a Muggleborn in the Harry Potter world. This would allow for his character to be integrated into the story more easily. The slash aspect could involve a relationship with Harry Potter himself. They could bond over their shared experiences of feeling different from others. Harry as a wizard with a unique past and Banner as a scientist with a big secret (the Hulk).
To blend their worlds well, the story could start with a magical accident that connects them. Then, it should explore how the rules of magic in Harry's world and the laws of the werewolf pack in Sam's world interact. For instance, if there is a magic that can control the transformation of werewolves, it could create an interesting dynamic. Moreover, the values of loyalty and friendship that exist in both worlds can be the glue that holds the story together. Characters from both sides can learn from each other's loyalty to their groups and form new bonds based on that.
Well, the key is in the character development. Start with how they first meet. If it's a situation where Naruto is initially scared or intrigued by the anthropomorphic girl's appearance, it sets up an interesting dynamic. Then, as the story progresses, their different natures can be explored. For example, if the girl is a water - based anthropomorphic like a mermaid - girl, and Naruto has his fire - based jutsu. There could be a conflict initially but then they find ways to work together. Maybe she uses her water powers to enhance Naruto's fire attacks in a unique way. This shows how their different natures can be blended in a creative and engaging manner.
Another way is through character development. A character in Harry Potter, say Neville, could go on a journey to master a bankai - like power. This could involve him training in a special place, like the Room of Requirement, which could transform into a training ground similar to the ones in 'Bleach' for bankai training. He would face challenges and grow as a character, all while blending the two concepts.