Android 21 is a character from the Dragon Ball series, introduced in the video game Dragon Ball FighterZ. She is a Bio-Android created from the cells of various powerful fighters, including Majin Buu and the Z Fighters. Initially, she appears as a kind and intelligent researcher with a deep interest in science, but she harbors a darker side driven by an insatiable hunger for power and sweets. Android 21 serves as the main antagonist in the game, posing a significant threat to the universe with her formidable strength and cunning nature.