Also known as: ドクター・ゲロ, 人造人間20号
Character from Dragon Ball Z. A genius scientist who is the mastermind behind the Red Ribbon Army Androids, chief amongst them the bio-organic Cell (Dragon Ball).
In the past, he had a son named Gevo (Dragon Ball) and a wife called Vomi (Dragon Ball), which were later the base for the design of his creations, Android 16 and Android 21 respectively. Gero later modified himself into a Cyborg, to which he codenamed this project Android 20.