Well, consider the personalities of the characters. Danny is a young, brave, and sometimes impulsive hero. The exorcist is likely to be more serious and traditional in their approach. In fanfiction, Danny might crack jokes or be a bit more laid - back compared to the exorcist. This could create some interesting dynamics, like the exorcist being frustrated with Danny's non -chalant attitude at times, but also coming to respect his abilities.
Imagine Danny Phantom's friends getting involved as well. Tucker and Sam could be curious about the exorcist's world. They might try to help Danny understand the exorcist's methods. Meanwhile, the exorcist could have some sort of sidekick or mentor figure in their own universe. These secondary characters could also play a role in how the main characters interact. For instance, the exorcist's mentor might be initially against working with Danny, seeing him as an unknown and potentially dangerous force. But through various events and Danny's good deeds, they could change their mind and support the partnership between Danny and the exorcist.
Maybe in this fanfiction, the world of Danny Phantom is being invaded by demons. The exorcist arrives in Amity Park to help. Danny initially doubts the exorcist's methods but soon realizes they can be a powerful ally. They learn from each other's techniques, like Danny teaching the exorcist about ectoplasm and the exorcist showing Danny ancient exorcism spells.
The characters interact in various ways. Danny could be called upon by the Justice League to deal with a particular threat that has a connection to the Ghost Zone. He would then have to work alongside heroes like Superman or Batman. Superman might be curious about Danny's powers, as they are so different from his own. Batman, of course, would be analyzing Danny's abilities and trying to find any potential weaknesses. Danny's enemies from his own series could also be involved, and the Justice League would have to learn how to deal with these new types of foes.
They could start off being cautious of each other. Danny might be a bit wary of the Martian Manhunter's powerful telepathic abilities, while Martian Manhunter could be intrigued by Danny's unique ghostly powers. Eventually, they would realize they can work together well.
They could also form an uneasy alliance. Danny's powers can be used to protect Poison Ivy from those who want to harm her for her actions. In return, Poison Ivy could use her plants to create a safe haven for Danny when he's in the human world and needs to rest or hide from his enemies. Their relationship could be complex, full of mistrust at first but gradually evolving into a mutual respect.
Fanfiction.net is also a great place. There are many talented writers who post their works there. However, the quality can vary, so you might need to do some sifting. Look for stories with high ratings and positive reviews. For Danny Phantom and Blue Exorcist crossovers, try searching for specific keywords like 'Danny Phantom Blue Exorcist crossover' to narrow down the results.
Character development is also a big theme. Writers might take a character from one series and put them in a situation from the other series to see how they grow and change. For example, Danny might find himself in the world of Blue Exorcist and have to learn how to deal with the exorcist's way of fighting demons, which could lead to new skills and a deeper understanding of his own powers.
Sam is also quite popular. Her goth - like personality and her strong - willed nature make her an interesting character. In fanfiction, she can be portrayed in different ways, like being even more involved in Danny's ghost - fighting activities.
Obviously, the main character would be Danny Phantom himself, but in two different forms or versions. One would be the original Danny Phantom from the canon source, and the other would be a version created by the fanfiction. There might also be his friends like Sam and Tucker who could play important roles in helping the two Dannys understand each other and deal with any issues that arise from their meeting.
Danny would probably be really curious about all the magic in Harry's world. He might ask a million questions and be eager to try out some spells. Harry, on the other hand, would be intrigued by Danny's ghost powers. They'd likely have a lot of fun showing off their abilities to each other.
If Naruto and Danny were to fight together, Naruto's Rasengan, which is a concentrated form of chakra, could potentially disrupt the ectoplasmic composition of some of the stronger ghosts that Danny faces. Danny's ghostly wail, on the other hand, being a powerful sonic - based attack, could be used to disorient enemies in the Naruto world. And Danny's ability to fly could give Naruto an advantage in aerial combat, which he doesn't typically have in the Naruto series without using special jutsus or summons.