I don't know as I haven't read it. But they could be angels, like Michael or Gabriel, or perhaps some human characters who interact with the angels.
Since it's an 'angel graphic novel', the main characters are likely to be angels. They could be angels with different personalities and abilities. Maybe there's a young and rebellious angel who is trying to find his place in the angelic world. There could also be some side characters like prophets or seers who help the angels in their quests. Or it could be that there are a group of angels working together against a common enemy, like a powerful demon. Without more information, it's hard to be certain.
One of the main characters is Otonashi. He's a key figure in the story, trying to figure out the after - life world.
I don't know the exact main characters without reading it. But it could have the falling angel as a main character, perhaps also some humans or other celestial beings who interact with the angel.
Since I haven't read it, I can't say for sure who the main characters are.
It's possible that there are multiple angels as main characters, each with their own unique type of angel wings. They could be in a conflict or cooperation situation, and the story could revolve around their relationships and how their wings play a role in their interactions, whether it's in battles or in the angelic hierarchy.
I'm not sure exactly who the main characters are in 'Dark Angel Graphic Novel' as I haven't read it. But it could be the Dark Angel herself/himself, who might be a strong and mysterious figure.
The main characters are Tessa Gray, Will Herondale, and Jem Carstairs. Tessa is the girl with special powers. Will is a Shadowhunter, he's quite complex and often moody. Jem is also a Shadowhunter, and he's very kind - hearted.
I'm not sure exactly who the main characters are in 'the night angel graphic novel' without reading it. But it could have a heroic character as the title implies, perhaps a female or male night angel who is the central figure.
The main character is most likely Street Angel. However, there could be other important characters as well. Maybe there's a friend from her childhood who still plays a role in her life. There could also be a local shopkeeper who she has a special relationship with, either as a source of information or a place to hide out. Additionally, there might be a police officer who has a love - hate relationship with Street Angel, sometimes trying to catch her and other times respecting her actions.
Since I haven't read the 'Blue Angel Graphic Novel', it's difficult to name the main characters accurately. However, in addition to the Blue Angel, there could be a mentor figure who guides the Blue Angel on their journey. There may also be an antagonist, someone who opposes the Blue Angel's goals. And perhaps there are other characters like family members or allies that contribute to the overall plot.
Since I don't know the details of the 'night angel graphic novel', the main characters could be the night angel and perhaps some sidekicks or allies who help the night angel in its journey. There might also be antagonists, like powerful villains that oppose the night angel's actions.