My story takes place in the futuristic world of 3000, when everyone thinks it's the apocalypse. By this time in human society, the world has changed pretty drastically. Children have virtually no value anymore, until they turn 18 and enter adulthood. There are two main types of families: the traditional families and the regular families. The traditional families are expected to have between 4 and 9 children. The Regular families *supposedly* are childless. Some of these families have one child that they hide away in closets or basements until adulthood. So by the time May rolls around, there are supposedly no people still of the new country that combines Sweden, Italy, and the USA. Except the kids that were left behind. One of my main characters is one of those kids, stuck in the city streets of the US. She was meant to be the first child of a traditional family, but her father died in a freak accident when she was six. From that day on she lived the life of an illegal, in a walk-in-closet. She is now ten years old. she is very defensive, and tries to make it on her own even if it's very illogical. She also trusts no one with secrets or any details of her past. She is constantly looking around as if she is trying to catch someone watching her. She is also a very quiet character.
I'm not sure how to develop her: through dialogue, no, she's too quiet. Through past experience, no, she's lived in a closet for the past 4 years. please help!