Beasts (ビースト, Bīsuto) are enemies in Killer Is Dead. They are a special variety of the creatures known as Wires, and originate from the Moon. Beasts do not wield weapons, but instead attack with their oversized claws and razor-sharp jaws. They are not very intelligent but possess high physical power, making them a formidable threat to Mondo Zappa. As with other types of Wires, Mondo can use their blood to fuel his cybernetic left arm.