Mara Chaffee is the daughter of Dr. Alan and Barbara Chaffee, and is the leader of the alien children.As the leader, Mara is the meanest and most dangerous of the alien children. She was responsible for her mother's death, as well as several accidents. She is Robert's mate, and they both used their powers to force Dr. Verner to show them the truth about the Roberts baby, David's mate.Her father was devastated that his daughter was unfeeling and unloving, and felt he had no choice but to use a briefcase with explosives to kill her and the other children, along with himself. Only David survives, and his mother, Jill takes him away to start a new life.