Okay, I’ve been stewing on this arc–and Pearl’s arc throughout the show and pre-canon–and I want to add on to this a little bit. I’ve written a bit about this in a few places-both meta and fic (for the latter, mainly Cycles and my new piece Moving On), but something I think is clear is that Pearl’s relationship with Rose, especially after Pink Diamond became Rose all the time, wasn’t just about love. (Though the love is real, even if it originally developed at least in-part out of Pearl’s programmed devotion to her Diamond.) Her relationship with Rose was also about identity.
Pink’s “shattering” also represents a shattering of the paradigm of Pearl’s entire existence and identity-framework. She was Pink Diamond’s Pearl…and now, without that, what is she? And that’s terrifying. And to cope, I think, she makes a shift. She loves Rose Quartz already, so she decides–perhaps subconsciously–that that is her new identity. What is she? She’s someone who loves Rose Quartz.
And she keeps this identity for the next five thousand years. It’s why she’s so threatened by Greg–he represents a threat to her being able to enact that identity. And even after Rose dies to give birth to Steven, this is her identity, though now how she enacts it is by honoring Rose’s memory in every way possible. In the extended intro, while Garnet and Amethyst both mentioning fighting for something, Pearl says only: “I will fight in the name of Rose Quartz and everything that she believed in.” What does she, Pearl, fight for? What does she want? It doesn’t matter. Only what Rose wanted did.
This is also the answer to the question she asks herself in “It’s Over Isn’t It,” as to why she can’t move on. Because to “move on” from the sense of immediate grief that she’s still holding would again represent the destruction of her identity.
But, like I said, Steven’s sacrifice at the end of Season 4, when Pearl realizes that she might have to choose between honoring Rose’s memory and doing right be Steven, she chooses Steven. In realizing that she wants to choose Steven, she realizes that she is capable of wanting. She is even capable of wanting things that are in direct contradiction to what Rose wants.
In Gemcation, when she tries to tell Steven the truth, she says:
“There are things that are impossible for me to explain. But I want to. I–”
And then, in A Single Pale Rose, after Steven finally does know the truth, she says:
“I’ve wanted to tell you for so long.”
Pearl wants. She’s wanted. She has desires all her own. And if that’s the case, she realizes, if she has desires independent of Rose, she must also have motivations independent of Rose, as she realizes (with a little help from Steven!) in Reunited:
What is she fighting for? She finally has an answer. She’s fighting for herself.
And if she has motive–if she can fight for herself–she must have a self!! One that’s independent of Rose. And we finally see that embodied in her new form–and her utterly new contentment–in Change Your Mind.
And if that’s the case, Pearl is finally, finally truly free to be herself. She’s free to discover and create who she is. She’ll never stop missing Rose or loving her, but missing and loving Rose is no longer all she is.