Warren Mears

Warren Mears is a major antagonist from the TV series Buffy the Vampire Slayer and the main antagonist of Season 6 until his death. He was a mad scientist-turned-major enemy to Buffy and her friends, especially Willow; he was responsible for the death of Tara and Willow's descent into madness. He eventually changed from his origins as a comedic villain to that of an evil misogynistic psychopath.