William Stryker is a fictional character from the Marvel Comics universe, primarily known as an antagonist in the X-Men series. He is often depicted as a military leader and scientist who is obsessed with eradicating mutants, believing they pose a threat to humanity. Stryker's character has appeared in various comic book storylines, animated series, and films. In the X-Men film series, Stryker is portrayed as a key figure in the government's efforts to control and eliminate mutant populations. His character is known for his ruthless tactics and manipulation, often using advanced technology and military resources to achieve his goals.