The most interesting characters can vary. Some fanfictions have dragon hatchlings that the reincarnated character takes under their wing. These hatchlings are full of curiosity and naivete, which contrast with the more jaded world of adult dragons. Then there are the dragon hunters. They add an element of danger and conflict as they are constantly on the prowl for dragons. Their motives can range from simple greed to a more complex vendetta against dragons, and their interactions with the reincarnated dragon can be intense.
One of the most interesting characters can be the original heroine of the story. In 'reincarnated as a villainess fanfiction', she might be portrayed in a different light. Maybe she's not as perfect as she seemed in the original. The villainess's family members are also interesting. For example, a brother who is overprotective in the original story might become an ally in the fanfiction. And let's not forget the mysterious wizard or mage characters who might have a role in the reincarnation process or help the new - turned - good villainess along the way.
The dragon hatchling itself is quite an interesting character. Its perspective as a reincarnated being in a new form makes it unique. There might also be some wise old dragons that are interesting. They could have a lot of knowledge about the dragon lore and the world in general.
Well, the dragon itself is really interesting. It goes through a journey of self - discovery as it grows. There's a female elf character that also stands out. She has her own motives and goals, and when she crosses paths with the dragon, there are some really engaging interactions. She's strong and independent, and her relationship with the dragon, whether it's one of friendship or rivalry, is a great part of the story.
The protagonist is often very interesting. They bring their modern - day knowledge or unique personality into the Pokemon world. And sometimes there are side characters who are aware of the system's existence and have their own motives related to it. For example, a mysterious old trainer who seems to know more about the system than the protagonist. Another interesting character could be a Pokemon that has some sort of special connection to the system or the protagonist's reincarnation.
In this type of fanfiction, the dragon's family members can be popular characters. If the dragon has siblings or a parent in the story, their relationships are often explored. For example, a protective older dragon sibling can add a lot of drama and warmth to the story. Also, there are sometimes villainous characters like dark mages who try to capture or control the dragon, and they can be very engaging as well.
There's likely the main character who is the reincarnated dragon. Their unique perspective as a human turned dragon is quite interesting. And there may be other dragons that they interact with, some might be friendly and some hostile. Also, characters from other races like wise old elves or strong dwarven warriors could be part of the story.
The dragon itself, of course. Starting from the egg stage, its journey of growth and development makes it a very interesting character. There are also probably some magical creatures that interact with the dragon. Maybe a wise old owl or a mischievous fairy that cross paths with the dragon at some point.
Batman is quite popular. Reincarnating as him gives the character a chance to have all his gadgets and detective skills. Also, Superman is a common choice. Having his superpowers and being able to fly around Metropolis would be exciting. Wonder Woman is another one. Her connection to the Amazonian culture and her superhuman abilities make for great fanfiction material.
Aether and Lumine are quite popular choices. Since they are the main protagonists in the original game, many fanfiction writers like to explore what it would be like if someone was reincarnated as them, perhaps with different personalities or goals. It gives a fresh perspective on the main storyline.
Jon Snow is quite popular. People like to be reincarnated as him because he has a lot of potential for growth and a mysterious backstory. They can use their new knowledge to perhaps avoid some of his tragedies and rise to power more quickly.