The focus on Carl throughout the narrative is more than just art appreciation. It symbolizes various things for different people. For some, Carl symbolizes humanity’s fear of the other and the belief that any highly advanced civilization would not be good to a less-advanced civilization. For others, the existence of Carl showcases what humanity could become as a collective. As a literal alien, Carl is the sum of each individual’s own projections and beliefs. If a person is fearful, then Carl symbolizes an invading, menacing force. Is a person is appreciative and hopeful, then Carl symbolizes the intrigue of life in outer space and the existence of extra-terrestrials.

Carl’s physical features symbolize strength and otherness. From his physical properties that defy all known elements to his 10-foot height and suit of samurai armor, Carl is definitely out of the ordinary. Even when no one suspects that he is alien, the running joke that he is from outer space stems from the fact that he does not look like anything that exists on Earth. Yet from the start, April senses life in Carl, as he stands there:

in the middle of the sidewalk, full of energy and power […] like it might, at any moment, turn and fix that empty, regal stare on me.