Giant Head (ジャイアントヘッド, Jaiantoheddo) is a character in Killer Is Dead. He was originally a human researcher at Area 151, but was transformed as a result of the experiments being conducted there. A colossal, seemingly alien life-form several hundred metres tall, Giant Head is woken from its sleep "a bit too early" and subsequently goes on a rampage, apparently stealing the Earth in the process. Mondo Zappa must eradicate it in order to protect the world.