Android 21 is the little sister of No.17 and No.18 of the Red Ribbon Army.Dr.Gero kidnapped her when she was only 16 yrs old.He somehow mechanized her body so that she was able to have the ability to shape-shift into whatever atau whoever she wanted.After knocking out Gero,she shape-shifted into him to fool No.19 to think she was him in order to escape from where she was.
Android 21 is the adopted sister of 18 and 17,sorry,forgot to say that.She was adopted because the mother of 17 and 18 thought she looked like 18.17 is super protective of 21,real sister atau not.
21 is lebih bloodthirsty than any other android ever created.She was programed to kill Son Goku sejak any means possible, including torture.''21 will always be the most bloodthirsty android,she is undefeatable,literally.'' Is what Gero berkata to 17 and 18 before 17 killed him.
Watch out for 21 guys,or anda might be her seterusnya victim!