I don't know the main characters in 'owl graphic novel' as there's not enough information. It could be the owl itself as the central character, maybe with some other forest animals as supporting characters like a wise old fox or a friendly squirrel.
Given the lack of knowledge about 'owl graphic novel', we can only speculate. The main character might be an owl with a unique personality. It could be a curious owl that is always getting into trouble and learning from its mistakes. There might be a mentor - like character, perhaps an old owl that imparts wisdom. And there could be characters that represent different aspects of the owl's world, such as a nocturnal predator that challenges the owl's place in the ecosystem.
Luz, Eda, and King are likely the main characters, as they are central in 'The Owl House' series which the graphic novel is based on.
Rorschach is also a key character. He has a very distinct view of the world and is quite uncompromising in his beliefs. His mask with the constantly - changing inkblot pattern is iconic.
The main character is, of course, Batman. He is the central figure fighting against the Court of Owls. There are also characters like Alfred, who provides support to Batman. And members of the Court of Owls themselves are important characters in the story, though they are more of the antagonists.
Luz is surely one of the main characters. She is often at the center of the action.
Since it's an 'owl friends story', the main characters are probably the owls who are friends.
Since I don't know the exact 'owl boy story', I can only guess. There's probably the owl boy himself. Maybe there's an old owl who acts as his mentor, teaching him about the ways of owls.
The girl, who may be at the center of the story's events, and the owl, which might play different roles like a protector, a guide, or a friend to the girl. Their interactions are what make up the core of the 'girl and owl story'.
In 'the christmas owl story', the owl is surely one of the main characters. There may be a group of forest animals that are friends with the owl. And perhaps there's a mysterious figure, like a magical Christmas spirit that appears to the owl and helps it understand the true meaning of Christmas.
The main character is the man who is about to be hanged at Owl Creek. He is the central figure around which the whole story revolves.
In the 'the old owl witch story', the main character is the old witch. She is the one who drives the story forward with her actions and magic. The owl is also a key character. It could be that the owl has a name and its own personality within the story. There might also be secondary characters like a young apprentice who wants to learn from the witch, or a hunter who stumbles upon the witch's lair in the forest and has an encounter with both the witch and the owl.