How Elsa Should Have Turned Out: Surprisingly enough, social isolation during childhood doesn’t usually lead to a mature and well-adjusted adulthood. To see a terrifying real-world example of what isolation does to kids, take a look at the story of Genie Wiley, who was abused and sequestered in a room for more than a decade. Her horror-story treatment resulted in, among other things, physical abnormalities (at age 14, she was the size of an eight-year-old) and the inability to speak or interact in any sort of social situation. Genie was 13 when she was found, and she never recovered from her trauma.
Although we don’t see any examples of physical abuse in the movie beyond the solitary confinement, this treatment in and of itself most likely would have resulted in extreme mental and emotional disconnect, speech problems, physical disorders … think Tom Hanks from Cast Away, especially with the added guilt and shame of near-sororicide. Being without human contact until the age of 21, she should have been making grunting noises and building human-shaped statues out of her own poop.