Android 21 is pure evil, having nothing but a desire to devour all the Z Warriors to satisfy her needs of eating and gaining more power to the point of being seen as nearly insane. However, these desires do not cloud her thinking as she is capable of making rational decisions and assess the situation at hand. Sadistic and sociopathic, 21 will go to extreme lengths to gain the power she desires. She also has a big sweet tooth for turning other people into sweets unless they can feed her fatass.