She’s and Android like you, you were both made by doctor Gero to kill Goku, but were located at a different lab and eventually forgotten about by the doctor. Somehow Android 22 has been activated and is now fighting Gohan, because 22 thought HE was Goku, and not his son. You watch 22 and Gohan fighting from a building, And 22 is learning as Gohan fights in his super saiyan form.

“You up there!! Please, you have to understand!! I can’t let her kill my father or run this innocent world!!” Gohan calls out to you, hoping he can try swaying you

“Silence, Son Goku!!” Android 22 interrupts, and resumes her fight against him