Nightwing is the primary character without a doubt. In addition to him, we might see his long - time allies such as Oracle. There could also be villains from his rogues' gallery. And considering it's a 'new order' story, there may be some characters who represent the new power structure or the forces that are causing the change in the order, and they would interact with Nightwing in various ways throughout the graphic novel.
Barbara Gordon also plays a significant role in many of the stories. She's Batgirl, and she has a complex relationship with Nightwing. And then there's Alfred, who provides support to Nightwing just like he does for Batman.
It's likely about Nightwing in a new order setting within the graphic novel format. Maybe it shows Nightwing dealing with new challenges, new allies or enemies in a world that has undergone some sort of major change in terms of its order or power structure.
Since it's about the new jedi order, there may be a group of core Jedi characters. Some might be from different species. There could be a Jedi master who is leading the new order, teaching the younglings. And there could be a rogue Jedi or an outsider who has an important role in the story, either as an ally or a threat.
In the 'nightwing origin graphic novel', Dick Grayson is the central figure as he is the one whose origin is being told. Batman is a major character as he has a huge influence on Dick's life, from training him as Robin to their complex relationship later. There are also appearances by other members of the Bat - family like Barbara Gordon (Batgirl) who has her own interactions with Dick. And of course, the villains he faces during his early days are also part of the story.
The main character is Nightwing. In addition to him, there may be characters that are important to his backstory, like his family members if they play a role in his origin or his development as a hero. Also, there could be other superheroes or anti - heroes that he teams up with or has run - ins with in the 'Earth One' universe. Villains are also likely to be main characters in the sense that they drive the plot through their actions against Nightwing.
I'm not entirely sure who all the main creators are off the top of my head, but usually there are writers and artists. The writers are responsible for coming up with the storylines and dialogue, while the artists bring those stories to life with their illustrations.
Since I haven't read it, I can't say for sure. But usually in such novels, there would be a protagonist who is either a new member of the order or someone trying to uncover the secrets of the order of the whills.
Since I haven't read the 'Magic Order Graphic Novel', I can only guess. There may be a main character who is an outsider at first but then gets drawn into the magic order. There could be an old wizard or mage who has been in the order for a long time and serves as a mentor. And perhaps a group of diverse characters with different magical abilities, like a fire - magic user, a healer, and a shapeshifter, who all play important roles in the story of the magic order.
There's Roy Greenhilt. He's a key character. And then there's Haley Starshine too.
Since the graphic novel is likely centered around Executive Order 9066, the main characters may include ordinary Japanese - American citizens whose lives were disrupted. There could be characters representing different aspects of this experience, such as a young person trying to adjust to life in the internment camp, an elder who had built a life in the US before the order and now faced loss, and also the military or government personnel who carried out the internment.