Obviously, the dog itself is the most important character. It's the protagonist whose life the story is centered around.
In some cases, there could be a kind stranger who has an impact on the dog's life. Maybe someone who helps the dog when it's in trouble or lost. Or perhaps there are other people in the dog's owner's family who interact with the dog in different ways, like a child who loves to play with the dog or an elderly person who the dog keeps company.
In this novel, the protagonist is key. But we can't forget about the secondary characters like the kind neighbor who offers help when needed. And there could be a teacher or a role model in the story who imparts wisdom and knowledge to the protagonist, shaping their character and future actions.
The main character is Zucchini. He is a young boy who has his own story of loss and growth. Then there are his friends like Simon. Simon has his own quirks and personality that add to the group dynamic. Also, the adults in the story, like the kind caretaker, play crucial roles in the children's lives.
I'm not entirely sure as I haven't read the novel in great detail, but the protagonist must be an important character. They are the ones having the experience of living in the bush of ghosts.
Often, there will be a love interest. This character will have a major impact on the protagonist's life, influencing their decisions and emotions. They may be a source of both joy and heartbreak in the first half of the protagonist's life.
The protagonist who is reincarnated as the villainess is very important. Also, the prince is a significant character as he is one of the main love interests in the story. Then there's the heroine of the original game who also plays a role in how the story unfolds.
The main character is likely the dog whose life the story is about. There may also be other characters like the dog's owner, other animals it interacts with such as cats or other dogs, and perhaps some humans in the neighborhood where the dog lives.
The protagonist is key. She has to face the challenges of being a villainess and changing her fate. There are her family members in this new life. They can influence her actions and decisions. For example, her father might have certain expectations of her. The other noble ladies she interacts with are also important. They can be friends, foes, or something in between. And then there are the servants in her household who can be sources of information and help in her new life.
Greg Heffley is the main character. He's the one whose diary we are reading and he has all these crazy experiences during the dog days of summer. Rowley Jefferson is also important. He's Greg's best friend and they often get into all sorts of situations together. And Greg's family members, like his mom, dad, and his brother Rodrick, are important characters as well.
The narrator, Mark Twain himself (in a semi - autobiographical sense), is of course very important. He takes us on his journey of discovery along the river.
The protagonist is at the center of the story in 'the life changer novel'. This character's actions and decisions drive the plot forward. Then there are the supporting characters. For instance, a teacher who imparts valuable knowledge and wisdom to the protagonist, which aids in their development. There might be a love interest as well. This character can add an emotional dimension to the protagonist's journey of change, either by being a positive influence or a source of conflict.