Smurfette principle
Contemporary shows are either essentially all-male, like "Garfield," or are organized on what I call the Smurfette principle: a group of male buddies will be accented by a lone female, stereotypically defined... The message is clear. Boys are the norm, girls the variation; boys are central, girls peripheral; boys are individuals, girls types. Boys define the group, its story and its code of values. Girls exist only in relation to boys."