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 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 know as I haven't read it. But it could have a young hero or heroine as the main character, someone who is new to the magic in the city.
There could be a group of characters. Maybe a brave adventurer who stumbles upon the strange magic, a wise old mage who has some knowledge about it, and a mischievous magical creature that helps or hinders the main character's exploration of the strange magic.
I don't know the main characters in 'Magic Emperor 163 Novel' as I haven't read it. But it's likely that the Magic Emperor himself is a main character.
Since I don't know the exact 'Magic Apprentice Novel', it could be the apprentice themselves. There might also be a wise old wizard as a mentor.
I don't know as I haven't read it. Maybe there's a brave knight as one of the main characters.
Emily is one of the main characters. She's a girl who gets thrust into the magical world and has to adapt quickly. Another important character is Void. He's a powerful and somewhat mysterious figure in the story.
There could be a young wizard who is also a science prodigy. He is eager to uncover the scientific secrets behind magic. Maybe there's also an old and wise mage who has been studying the science of magic for years and serves as a mentor to the young wizard.
Since I don't know the exact 'big magic novel', it's hard to say. But usually in a magic novel, there could be a young wizard or witch as the main character.
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.