Killer the Butcher is the most prominent villain in the anime Invincible Superman Zambot 3. Butcher is responsible for sending out the monsters Mecha Boosts to attack the Earth, particularly Japan. Butcher is a rather eccentric villain, and is seen constantly indulging in luxuries, be it eating endless amounts of meat, trying on jewelry, or attempting to sun bathe despite being inside of the Bandok.
However, this extravagance does not make him any less ruthless. Butcher was sent by Gaizok to kill the humans, and that's exactly what he plans to do. Butcher's headquarters is the powerful mobile fortress, Bandok.