In many 'book of magic novel' types of stories, there could be a wise old wizard as one of the main characters. He might guide the younger characters in their exploration of magic. There could also be a group of friends who together embark on magical adventures, each with their own unique skills or powers related to magic.
Perhaps the main character is a normal person who stumbles upon the 'book of magic graphic novel'. They then become the center of the story as they are thrust into the magical world. Along the way, they meet other characters like magical beings who have been waiting for someone to discover the book and set in motion a series of events that will change the magical world.
I don't really know the exact main characters in it. It could be a young hero or heroine who has the ability to interact with the magic book.
The hero is one of the main characters, of course. There are also various supporting characters like the wise old wizard who gives advice and the brave knight who sometimes aids the hero in battles.
I recommend "Dragon Slaying Archmage" to you. The protagonist has a strange pair of eyes and creates a very powerful spell. He wanders between all the monsters in the foreign world and the evil Fire Dragon God. Maybe you remembered wrongly. He wasn't born with four Elements, but his magic is indeed very powerful! I hope you like this fairy's recommendation. Muah ~😗
I don't know for sure since we don't have more details about this 'the magic novel'. But usually in a magic novel, there could be a young apprentice who is learning magic. There might also be an old and wise wizard or witch as a mentor figure.
I don't have enough information to say who the main characters are in the 'as if by magic novel'. It could be a young protagonist, perhaps a girl or a boy, who is at the center of the magical events.
I don't know for sure as I haven't read this specific book. But perhaps there is a young hero or heroine who is drawn to the shadow magic book. There could also be a wise old mentor figure who knows about the book's history and significance.
There could be a young adventurer as a main character. He is brave and curious about the magic book.
One of the main characters might be a female magic knight, let's call her Lily. She has a special connection to nature - based magic and uses her powers to heal as well as fight. She is often the voice of reason among the group of knights. Another main character could be a young and impulsive knight named Tom. He is full of energy and enthusiasm, but sometimes his impulsiveness gets him into trouble. Together, they form a core group of characters in the Magic Knight Novel.
The main character is of course the Magic Emperor himself. He is a very determined and talented mage.