Lina Mayfleet from The City of Ember is a young girl living in a post apocolyptic setting. They live underground and there are strict rules about many things. Lina has an acute sense of justice and when she realizes that those in power are corrupt she tries to tell many people, none of who will listen, or feel compelled to do anything. She begins to realize that the tales about there being no other world might actually be true, since she's caught the administration in several lies (in particular the colored pencils which she owns). She has been having vivid dreams of a world filled with light and sunshine, even though she's never experienced any of it.