Obviously, the 'ugly girl' herself would be a main character. She is the center of the story and the one whose diary we are presumably reading.
Another possible main character could be a love interest. He or she might be the one who challenges the 'ugly girl's' perception of herself and shows her that she is worthy of love despite what she believes about her appearance.
Well, the main character is surely the 'ugly girl' herself. We don't know her name yet, but she is the one whose thoughts and experiences are being recorded in the diary.
Well, it could be about the daily struggles and insecurities of the so - called 'ugly girl' in the story. Maybe she's trying to find her place in a world that values beauty a great deal.
The main theme might be about self - acceptance. The 'ugly girl' in the title could imply that the protagonist struggles with her appearance and through the diary, she might be on a journey to accept herself as she is.
There could be her best friend who is always by her side and gives her moral support. Also, a mentor figure, like an old wise woman who teaches her how to control her powers.
The main character is likely the girl described as having a big mouth and being ugly. There could be other important characters such as her family members. Maybe her parents play a role in how she views herself, whether they are supportive or add to the pressure she feels because of her appearance. There could also be a teacher or a mentor figure who helps her realize her worth.
Greg Heffley is the main character. He's the one writing the diary and going through all the daily struggles. Then there's Rowley Jefferson, Greg's best friend. He's a bit more naive than Greg.
Typically, you'll see Yuno Gasai as one of the main characters. She's a very prominent character in the original Future Diary series, and in fanfics, her complex personality and relationship with Yukiteru Amano are often explored further. Yukiteru Amano himself is also a mainstay. Their dynamic, which can be quite intense and often has elements of love and danger, is a popular focus in these fanfics.
I'm not sure as I haven't read it specifically. But usually in a novel like this, there might be a character who is the focal point of the 'ugliness' concept, perhaps someone who is ostracized because of their appearance or actions.
As I haven't read it, I can't say for sure who the main characters are. But I assume there would be the girl herself, and perhaps her friends or family members who play important roles in her story.
The main character is surely the 'green girl', but depending on the genre of the fanfic, other characters will be present. If it's a mystery - themed fanfic, there could be a detective character trying to solve a mystery related to the 'green girl'. Or if it's a fantasy - based fanfic, there might be magical creatures or wizards that are part of the story and interact with the 'green girl'.