Where Every Scroll is a New Adventure
Ok, so I have seen bits and pieces of the different routes for Slay the Princess (no I have not played the game, and no, I don't mind spoiling routes to myself, it will not break my experience), and one thing I'm honestly surprised about is how little the "kill yourself" thing seems to be used. As I have been able to pull from different sources, there are only 2 major times it is used; the first is when you would be forced to sit in the cabin after the princess is dead, the second being to kill the ghost princess. Note, I do not consider the death on the damsel route because technically it is not the player choosing to kill themselves. And i don't know if the apotheosis route self kill can be considered because she is influencing you to end yourself.
Why is the "slay yourself" function not used more? Your actions relating to the princess affect how she acts with you in further routs, so killing yourself without killing her should do the same. After all, this is a love story right? And love stories don't just consider how you act to your partner, but also to yourself. So, a quiet that kills themselves instead of the princess should cause a reaction for the princess. Maybe a "first princess" like the stranger who reacts to the knife in fear, but not for herself, but relating to you. It could lead to more "caring" routs, like a doctor esk route where the princess is trying to figure out what is wrong with you, or a rout where the princess becomes indifferent towards you and offeres a clean seperation after the both of you leave the cabin where you don't have to be together after because it is clear you are not compatible.
Another piece of this could relate to the Nightmare and the moment of clarity, where the "moment of clarity" causes a change where instead of the voices disappearing, the long quiet feels like they are resting and have slotted themselves into themselves, and they say they look battered and bruised, but not yet dead. And in the next route after the Nightmare they can ask the question "do you remember?" whitch can bring more voices out instead of just the hero, because past relationships can color how people view their next relationship, make them see danger where there isn't, make them scared of love or fall harder, make them hurt themselves in an atempt to please their current spouce or be more indiferent in the relationship.
I know part of each route is supposed to be forgetting all that happened in the last route, but that can't fully be the case, after all, you aren't allowed to repeat routes, so you at the least have to know you've done something like that route before, maybe something like remembering something you did in the past but not remembering it clearly. Like foggly remembering your past relationships.
And with these new routs it can lead to a new ending thing where the long quiet isn't scared for the little people out there but is scared of how the princess would treat them once the both of you get out, after all, you have both hurt eachother , and despite being change it doesn't seem like she will ever stop hurting you if you make one mistake. So maybe quiet can yell something like "and how do i know you won't just kill me once we are out! You and your parts have proven time and time again that you only care for your freedom! You don't care how you get it! You don't care i was forced to act the way i did because of the stupid man who tore us in two! You only cared about getting parts for yourself to make yourself whole without giving me an actual chance to understand myself in this!" after all, the long quiet never got to look at what was going on in a rout, they had to keep making decisions in the moment, no time to let them cool off, no time to think rationaly, look at the outcomes that could happen.
And maybe from it, the mound realizes that while she is whole, you are still fractured and broken. So, as a god, she offered for her to reset the construct, so perhaps next time you can put your own pieces back together.
It's just a thought. Have fun with it.