Android 18 (人じん造ぞう人にん間げん１８号ごう Jinzōningen Jū Hachi-Gō), originally named Lazuli (ラズリ Razuri) when she was an ordinary human, is the older twin sister of Android 17 and Dr. Gero's eighteenth android creation, designed to serve Gero's vendetta against Goku.
