Answer:
Gregor Samsa is the protagonist of The Metamorphosis, a novel by Franz Kafka that tells the story of a man who suddenly wakes up as an insect, beginning to be despised by his family, whom until then he had financially supported.
This story is riddled with metaphors regarding the social changes that were taking place in the early 1900s. Kafka, who supported philosophical existentialism, saw how society was losing its values in pursuit of an increasing consumerism and individualism.
Thus, he portrays Gregor as he feels in that society: an insect, a rare being who feels despised by others. In addition, Gregor's own personality is similar to that of the author: an individual with a high sense of responsibility and guilt, who has within him a fear of rejection and a tendency towards loneliness and sadness.