In the book, "The Red Pyramid," by Rick Riordan, the non main characters interact and influence the main characters very much. For example, the dad of the two main characters travels with Carter, one main character, and Carter does not go to school. However, Carter is still very smart and his dad teaches him (his dad is an archaeologist). Since Carter does not go to school, he doesn't have any friends. I think that Carter would be a completely different person if he went to school; he would have some friends, and he would also have better social skills.

     On the other hand, there is Sadie. Sadie lives with her and Carter's grandparents. Unlike Carter, Sadie does go to school, and is apparently very popular. Since Sadie and Carter don't usually see each other, then they don't get along very well because they are very very different and hardly know each other. Also, Sadie barely knows their dad too. Carter and his dad are only allowed to see Sadie one day a year.

     Since Sadie lives in Britain with her grandparents since she was six, she has developed an accent. This accent makes her seem very pompous and unlikeable. Carter is a very humble person who does not have an accent, so he seems very likeable and normal. I think that another reason Carter doesn't get along well with Sadie is because of her accent. Later on in the book though, Carter and Sadie grow closer to each other, but only because they are both in harms way and they have to work together to save their dad. The police think that their dad is a terrorist who blew up a museum, when it was only a mythical magic thing.