I think this is also a good time to stop and compare Oriko and Kirika a little bit. I think that they contrast really well.
Oriko here needs to accept herself. She made herself change for a goal she could have had if she hadn't changed herself in the first place. Literally, everything Oriko has done has put her in worse position than before.
Contrast that with Kirika.
Kirika literally made a wish to change herself into a person that Oriko would need.
But unlike Oriko, Kirika is actually happy. Why the fuck is that? Why is it that one person changed herself into a different person to grab someone's approval when that only resulted in her misery, but the other did the exact same thing and was rewarded for it?
I think it's because, even before her wish, Kirika is kind of simple. And by that, I mean that she knew what she wanted.
In some ways, I feel like this goes against instinct, right? Like, the person who wished to have a meaning in their life and the person who wished to change in order to be loved by someone should have their emotions swapped here. One person wished for herself, and the other wished for someone else.
And I think also, it's kind of uncomfortable too, right? Like, Kirika changed herself into this:
And look at the way she's been treated! Oriko might buy her pancakes, but Kirika is repeatedly hurt throughout the event. She does horrible things in Oriko's name. She's literally killed people! Isn't it kind of odd that she's rewarded for doing the wrong thing here? Even Mami and Kyoko say it in the PMMM anime-- you should make your wish for yourself, and not someone else. But here, Kirika made a wish to be a different person suitable for Oriko and she's happy for it!
But I think this can be answered by Oriko herself, earlier.
Why does Kirika's change work, and Oriko's not?
Kirika wasn't lying to herself.
And that's the hilarious thing-- Kirika changing herself for someone else is really the most true "Kirika" thing she could have done.
Like, just think for a second what it means to want to change your entire being in order to appeal to someone. That's an intense level of devotion and a complete lack of love for your own opinions. Changing herself was already in her nature, and so was that scary yandere-level of devotion she has.
Even though it's uncomfortable, even though it's not really great, even though being a subordinate isn't kind of what we're supposed to aspire to be... That's what Kirika wanted. And she wasn't "weak"-- she didn't reject that part of herself. She knew what she wanted, and she went for it.