It's hard to say exactly who the main characters are without reading the fanfiction. But it's possible that aside from the RWBY girls, there could be a mentor - like figure who helps the reborn - as - a - dragon character understand their new powers. This could be an older character from the RWBY world or someone completely new. And of course, the reborn dragon character itself would be a central figure, with their own personality, goals, and relationships within the story.
The main characters would likely include the one who is reborn as a dragon. If it's based on an existing RWBY character, then that character's personality would be transformed along with their form. And then there are the RWBY team members who would be involved in the story. They could be friends, foes, or something in between to the reborn - as - a - dragon character. There might also be antagonists specific to this fanfiction, perhaps those who want to use the dragon's power for their own evil purposes or those who simply fear the dragon and want to get rid of it.
In some 'dragon rider rwby fanfiction', there could also be side characters from the RWBY world that play important roles in the story. For example, Qrow could be involved, guiding the dragon rider and the RWBY girls in their adventures. Also, the headmasters of the academies might show up to give advice or help in times of need. The dragon rider's dragon could also be considered a main character in a sense, with its own unique abilities and behaviors that affect the story.
Well, it's hard to say for sure without reading it. But if it's based on RWBY, Ruby and her team are probably central. However, with the'myth reborn' aspect, there could be new characters introduced who are related to the myths, like a mythical figure who becomes an ally or an antagonist. It could also be that the existing characters have some sort of connection to the mythological world now, and their character arcs are adjusted accordingly.
Most likely Weiss, Blake and Yang. They are Ruby's teammates in RWBY and would play important roles in any fanfiction where Si is reborn as Ruby. They would be there to support and fight alongside the reborn Ruby (Si).
It could be about a character being reborn as a dragon in the RWBY universe. Maybe it involves the character having to adapt to their new form, deal with new powers, and interact with the existing RWBY characters in a whole new way.
The main character is definitely the entity that is reborn as a dragon egg. This character experiences a complete transformation from its previous form (although we may not know what that was initially) into a dragon. Along the way, there could be other characters such as wise old dragons that act as mentors, or perhaps some humans or elves that cross paths with the newly hatched dragon. These secondary characters can either be friends who help the dragon understand the world better or enemies who see the dragon as a threat to their own existence or power.
I'm not sure as I haven't read it, but it's likely the reborn dragon is a main character. There may also be other characters like a wizard or a brave knight who interact with the dragon.
Probably Goku would still be one of the main characters. He's the face of Dragon Ball after all. Vegeta is also likely to be a main character as he's always been an important part of the story. Maybe there are new characters created specifically for the fanfic that also become main characters, but without reading it, it's hard to say for sure.
Goku is often a popular choice. Since he is the main protagonist of the Dragon Ball series, imagining him being reborn with different powers or in a different situation can be really exciting. For example, being reborn as a half - human, half - Namekian with the ability to use Namekian techniques along with his Saiyan powers.
Well, Weiss could be one of the main characters. She might initially be skeptical of this 'new' Ruby but then grows to accept and rely on her. Their relationship could be full of bickering at first but then develop into a strong friendship.
For me, Penny is a super exciting character to interact with in this kind of fanfiction. She's so unique, being an android with a big heart. You could have some really cute and heartwarming interactions with her. Also, Neo. Her silent but deadly style and her loyalty to Roman make her a very mysterious and interesting character to interact with. You could get into some really intense cat -and -mouse type of interactions with her as she tries to carry out her plans while you try to stop her.