Billy Pilgrim is the protagonist of Kurt Vonnegut's novel, *Slaughterhouse-Five*. He is a World War II soldier who becomes "unstuck in time," experiencing moments from his life out of order. This unique narrative structure reflects the chaos of war and the impact it has on individuals. Throughout the story, Billy encounters various events, including his time as a prisoner of war and his abduction by extraterrestrial beings from the planet Tralfamadore. His experiences highlight themes of fate, free will, and the nature of time, making him a complex character in the exploration of human existence.