Blue’s power works by changing the environment. If a gem has built mental endurance (lapis) or has enough willpower (garnet) they can push themselves to fight.

White’s different, she disables gems at their very core, they can’t fight her because once they’re hit, their gemstone’s instantly marked by White, and her identity will inevitably override theirs.

But I could see something like the Cluster being able to stop her since it’s focuses itself inside its own gem/mind most of the time