Gregor Samsa, the character who turns into a cockroach in Franz Kafka's "The Metamorphosis."
(Side note: I once had to do an essay on this Kafka short story in college. As I was preparing the title page, I spied a real cockroach zipping across the floor. I corralled said cockroach, slapped him on the copy machine along with my title page, and printed out a new page complete with bug. I got a "Nice bug!" comment from the professor and an A on the paper. Oh, and no cockroaches were harmed in the making of this essay; the cockroach in question scurried off after just one copy.)