Before the split and transformation to her true form, Android 21 (Good) looks identical to her original self: Android 21 is described as a busty scientist with glasses and long bushy auburn hair. She has a gold ring on her left middle finger, and black nails.

She wears a pair of hoop earrings, a sleeveless, blue and red short dress with black stockings, black arm sleeves, and blue and red heel boots.

The good Android 21 represents her original self's good side.