Imma be honest: Not a fan of the succubus prison quest. Rinny did not leave off looking good at the end of it, wasn't a fan of the impossible boss fight with the queen. What was the point of all that aside from the lewd stuff that wasn't my kink that I skipped?
I really hope later in the game we got some revenge on the queen. Maybe give her the French Revolution treatment.
I also didn't like that in this part of the story, Rinny, who was previously sweet and cheerful, suddenly became some kind of cruel and deceitful selfish bitch, and for no apparent reason. However, the adventure in the succubus prison has its positive sides:
1) +1000 to eroticism and mysticism after completion.
2) the appearance of wings, a tail and an alternative sclera on the character.
3) a new skill.
And all this can be obtained without any lengthy preparation. I also hope that the wings and tail will have some use, besides flying over dubious parts of the graveyard.
In addition, there is one more unexplored area in the prison.
Rinny seems deceitful because she initially promises the protagonist that she will help with escape from prison, and then it turns out that she plans to leave her friend in this cell forever. That is, she behaves almost like Edith in the hidden extended ending. At the same time, it seems like an act of cruelty. And she does this to a person who previously saved her twice.
This could be explained by "brainwashing", but the queen denies it. In addition, after returning from prison, when Rinny seems like her old self, she still says that she does not regret her attempt to leave her friend in prison forever.
As for the queen, she seems more frivolous and "decorative" than cruel. She does practically nothing in the real world.
But we don't need to take all this so seriously. These are just pieces of code, not real people.
What part of the story made you think that Rinny planned all along to leave her friend in prison forever? Does that mean you've interpreted the story as Rinny deceiving you and just stringing you along from the beginning? If so, what happened in the game to make you come to this conclusion?
I actually do need to take this seriously, because I feel like I wrote the story to allow the player to understand why Rinny did what she did and be sympathetic towards her. So for that to completely not land for you (and others) means that either it was too vague, or I've messed up somewhere.
I'm not saying your experience is wrong of course. Everyone is meant to interpret the story as they will. This is more for me to improve my storytelling skills.
No, it didn't seem to me that Rinny was trying to deceive the protagonist, starting with their introduction, of course. In fact, she seemed like the most sympathetic character in the game to me. And while the adventure in the succubus prison didn't have a sequel that would allow you to accompany her during her audience with the queen, it seemed to me that the bad ending that followed was simply the result of brainwashing or something like that.
But when the sequel appeared, a chain of events involuntarily arose: 1) Rinny persuades the protagonist to stay in prison; 2) having received a refusal, she is very upset, but seems to agree to assist in the escape; 3) after an unsuccessful battle with the queen and turning into a true succubus, she is already openly trying to deceive the protagonist, saying "everything will be fine, you don't need to worry, I will do everything" - and in fact, her goal is to leave her friend in prison forever; 4) after waking up from the dream, Rinny says that she invited the protagonist to an audience with the queen only because she was afraid to go alone (that is, not at all to help the protagonist escape from prison).
You see, Mistira is hostile and dangerous, but if she promises something, she does it. Marin, although she has reasons to be offended by the protagonist, always knows where to stop in her "revenge". And Rinny - it just so happened - shows treachery and a complete lack of empathy. She herself was just captured by Edith, and she did not like it there - why does she not understand that her friend can feel the same?
But be that as it may, I do not want to impose my opinion. The game has the main thing - it maintains intrigue, there are mysteries that you want to solve - from the origin of the protagonist to the closed door in the horror shop. And this episode, in the end, can be explained by some kind of clouding of Rinny's mind, especially since she then returns to her usual behavior.
What I gathered from the sequence of events was that Rinny's change was not just a physical one but a mental one. Asking her about it reveals that the change brought a rush of new sensations and feelings and she simply got lost in the moment, like a sudden high from which she couldn't quite come down. Once you talk to her later you notice she's sealed away that power because she sees how dangerous it makes her and doesn't want to go out of control again. It's almost like she's got a bruce banner/hulk dichotomy going on, except it's lust instead of anger.