Android 21

Android 21 (人造人間２１号, Jinzōningen Nijūichi-Gō) is a new Android who's intellect rivals that of Dr. Gero, though she may be even smarter than he was. She appears as a playable character in Dragon Ball FighterZ, fighting in a form that resembles that of a Majin.

Background
A mysterious new Android who is somehow connected to Android 16. In her default form, she's a young woman with long, bushy hair, who wears glasses and is supposedly as smart as Dr. Gero, perhaps even more so.