"Everything in the story comes back to the theme of isolation, and the problems we create when we shut ourselves out from the world. Elsa (Idina Menzel) was born with witchy, wintry powers that allow her to create ice and snow out of thin air. Yet she can’t control her abilities fully: like a Disney-fied Hulk, they manifest whenever she is feeling strong emotions, like fear or anxiety. During childhood, she almost accidentally kills her bubbly, adventurous sister Anna (Kristen Bell) during a late-night game of play. As a result, her concerned parents tell Elsa that she must get a hold on her abilities and shut her in her room until she is able to do so. But the memory of the event haunts her, and the fear of it happening again renders her incapable. She hides in her room for years, even when her uncomprehending sister begs her to come out and play.
After their parents are killed in a convenient boating accident, Elsa is to take the throne, which means the castle doors will open for the first time in over a decade. Anna is overjoyed, running around the castle like an excitable puppy, having been shunned by her sister for almost all her life and desperate for company. But Elsa is petrified. If anyone finds out her secret, she fears she will be made an outcast, despite her regal lineage. Worse, a monster.
There is a refrain Elsa repeats to herself over and over again: Be a good girl. The kind of refrain that women have heard since the dawn of time. “Be a good girl and don’t show your true emotions,” or “Be a good girl and don’t think too hard,” or, ”Be a good girl and don’t talk back.” To see this acknowledgement of the type of harmful language that has repressed women for centuries in a movie—and not just any movie, but a movie for little girls—is not only impressive, but also really important.”