Android 21's backstory varies and it seems she herself does not know the truth. In one instance she claims she was initially a Human-type Earthling, converted by Doctor Gero into an Android. As a human, she had a son with Dr. Gero who became the model for the design of Android 16. Lab Coat Android 21 is also a powerful, well-rounded character who shuts down her opponents with her fiendish Photon Pulse. Easy: To learn and to master. Neutral on a Leash: Has all the ways to control neutral and get a hit in without assists. give Lab Coat some of the most threatening pressure in the game.