There could also be her friends or family members. In many stories, the bad girl's actions affect those close to her. For example, her parents might be trying to correct her behavior, or her friends might be getting dragged into her misadventures.
Well, there must be the bad girl herself. She's likely at the center of the story, causing all kinds of trouble or having a negative impact on those around her.
There could be a lead 'bad girl' who is the most rebellious and fearless. She might be joined by her friends or other girls who she meets on the island. Their personalities could range from sassy and outspoken to cunning and resourceful, and together they form the main characters in this 'bad girl island story'.
Obviously, the main characters are the good boy and the bad girl.
There could also be a male character who is caught in the middle of the good girl and the bad girl. He might be attracted to both of them for different reasons. He could be a jock who is used to getting attention from girls, but the good girl and the bad girl present him with different challenges. He has to decide which one he really wants to be with, and this decision could be based on his own growth and values.
Since I haven't read this particular Wattpad story, it's hard to say exactly. But likely, the main character is the girl who goes from good to bad. There might also be a best friend who tries to stop her from changing or a love interest who either encourages or discourages her new behavior.
I'm not sure exactly as I haven't read it, but surely the bad girl is one of the main characters. There might be a best friend character who either supports or clashes with her.
In the 'Gossip Girl' series, Serena van der Woodsen is one of the main characters. She is often seen as a 'bad girl' as she has a wild past and is involved in various romantic and social dramas. Blair Waldorf is another key character. She can be quite mean - spirited at times in her pursuit of status and love, often engaging in schemes against her friends and rivals.
Since I don't know the exact 'good girl go bad novel', it's hard to say. But typically, the main character would be the girl herself who goes through the transformation. There might also be a supporting character like a friend or a love interest who either helps or hinders her journey from good to bad.
I'm not sure exactly who the main characters are without reading the novel, but it's likely to have the bad girl herself as a main character. There might also be characters who knew her before her transformation and are now reacting to her new 'bad girl' persona.
The main character would likely be the girl herself who has been behaving badly. Maybe she's a young girl who is going through a rebellious phase.
The main characters are Marcus and Mike. They are the ones who drive the story forward with their actions and their relationship.