Since I don't know the exact'morph girl story', I can't say for sure. But it's likely that the morph girl herself is a main character. There might also be her friends or family members who play important roles, perhaps some who are aware of her morphing ability and some who aren't.
In the'morph girl story', the main character is obviously the girl who can morph. There could be an antagonist, someone who wants to use her power for their own evil purposes or who is threatened by her. And then there might be a mentor figure, someone who helps her understand and control her morphing ability, like an old wise woman or a scientist who has studied similar phenomena.
Given the title 'Alex Morph Summer Love Story', Alex is most likely the central character. As for the others, if there is a love story, there should be at least one more character, perhaps a friend or a stranger that Alex meets during the summer and eventually falls in love with. It could also be that there are some supporting characters who play a role in the events related to Alex's transformation (morph) and the development of the love story.
The'morph girl story' could potentially be about a girl's journey of transformation, perhaps not just physically morphing but also in terms of her personality or life situation. Maybe she discovers she has this unique ability to morph and has to deal with the consequences and challenges that come with it, like hiding it from others or using it to help people.
The Morph Girl comic is appealing because of its unique art style and interesting plotlines.
Since we have no details about 'the 100 girl story', we can only guess. Maybe there is a leader among the 100 girls who is a main character. Or there could be a few girls who are different from the rest in some way, like having unique skills or personalities, and they are the main characters.
Girl muscle morph comics usually feature exaggerated muscle growth on female characters. They might have a focus on strength and empowerment.
Well, surely the girl herself is a main character. And probably her family members, like her parents or siblings who would be deeply affected by her vanishing. There might also be a detective or a police officer if it's a mystery - style story, as they would be trying to solve the case of her disappearance.
In 'gone girl story', the main characters are Nick and Amy. Nick is the somewhat clueless husband who is thrust into the spotlight when his wife disappears. He has his flaws in the marriage. Amy, on the other hand, is a very complex character. She is smart, manipulative, and she uses her intelligence to stage her disappearance and then later to re - enter Nick's life in a very devious way. There are supporting characters as well, like the police officers involved in the case, but Nick and Amy are the key players.
Since I don't know the exact'replacement girl story', I can't say for sure who the main characters are. But likely, there is the replacement girl herself. There might also be the person she is replacing and those who interact with both of them, like friends, family members, or colleagues.
I'm not familiar with the exact 'the boston girl story', but typically in a story about a girl, the main character is the girl from Boston. In addition to her, there could be important secondary characters. For example, a teacher who has a big influence on her life, or a neighbor who she has a special relationship with. These characters could play crucial roles in her story, whether it's providing support, causing conflict, or helping her grow as a person.
Since I don't know the exact 'the frozen girl story', it's difficult to say. But most likely, the main character would be the girl herself. There might also be other characters like her family members if the story is about her getting frozen in a normal setting, or perhaps a rescuer if she's in a dangerous frozen situation.