Another theory: white pearl was originally pinks. White did the equivalent of a lobotomy on her to make her hers. That’s why her eye is missing (the sharp object would go around the eye in lobotomies) and why she’s not expressive/emotive/is robotic.
If you made her pink she’d look just like pink pearl 😨
It feels like … she just tossed Steven into a playpen. Like Pink was so horrendously beneath her, that White saw her as nothing more than a newborn child.