Though "heroine," the feminine form of the word "hero," refers to a woman with exceptional achievements and qualities, many people use the word to refer to the main character in a film, play, or novel. Some fathers are heroes, but the majority of mothers are heroines. The word "hero" comes from the Greek god Zeus, who had only one mortal female companion named Hera. They were so fond of each other that they are often called "the gods together." Like many ancient cultures, Greece believed in pairs of opposites such as good and evil, black and white. Thus, it was only natural for them to have a pair of heroes - one good and one bad - to fight on their behalf. Heroes are usually people who risk their lives to save others. While some individuals may show courage in everyday life, this behavior is not always recognized by others. Only when there is a need for saving lives does the courage become apparent. That is why heroes often have a reputation for being brave even though they might prefer not to be seen as aggressive or threatening. A heroine is someone who shows extraordinary courage and strength of will. She is also likely to be highly motivated, determined, and loyal. These are just some of the traits that make up a heroine. There are many characters in literature and cinema who meet these criteria, such as Elsa from "Frozen", Princess Leia, Katniss Everdeen, and Arya Stark.