The main characters are Lola and the boy next door. We can assume Lola is likely to be a girl with her own personality, dreams, and perhaps a bit of a rebellious streak. The boy next door is probably someone who has his own charm, and they are brought together by the proximity of their homes.
Well, Lola is surely a central figure. She could be a young girl who is into fashion or some other form of art. The boy next door might be someone who is interested in different things like music or sports. Their differences could be what makes their relationship interesting. They might start off as just neighbors but as the story unfolds, they become important to each other's lives in different ways.