There's Margot, a girl who has memories of the sun from Earth. She's a bit of an outcast among the other children on Venus. The other children, though not named individually for the most part, play a big role as well. They are the ones who bully Margot because of her difference, and their actions drive the story forward.
Overall, the characters in the story represent different aspects of human nature. Margot represents the individual who is different and suffers for it, while the other children represent the mob mentality that can be cruel and thoughtless.
The main characters are Margot and the other children. Margot is the central figure who stands out because she remembers the sun. The other children are a group who, due to their own lack of memory of the sun and perhaps envy, treat Margot badly.
The main characters are the children who live on Venus.
Obviously, the sisters are the main characters. But there could also be other supporting characters like their parents, who might be involved in some way, for example, by giving them advice on how to spend the day or by providing them with things they need for their activities.
Margot is a key character. She's the girl who has the memory of the sun. And then there are the other children. They are the ones who are jealous of Margot and end up locking her in a closet. They are all on Venus, and their actions towards Margot drive the story.
The main characters are Margot and the other children. Margot is the one who has seen the sun before and is different from the rest.
Since I'm not familiar with the 'A Summer to Remember' short story, the main characters could be typical of a summer - themed story. There might be a young protagonist, perhaps a teenager. There could also be friends or family members that play important roles, like a best friend who goes on adventures with the main character, or a wise grandparent who imparts some valuable life lessons during that summer.
I'm not sure specifically as we don't have more details about this story, but they could be a young person who is sad to see summer end and has to face going back to school or a more grown - up character who realizes that the carefree days of summer are over.
Since we have no specific details regarding this story, the characters could be anyone. It could be a young person who has made new friends during summer and is now parting ways with them on the last day. Or perhaps it's an older character reflecting on their past summers and the people who were part of those summers.
I don't know the main characters as I haven't read the novel. But they could be teenagers enjoying their last day of summer break, like a group of friends who have different personalities and goals.