Thank you so much for your reply, I unlocked it! ^^ For some reason, I had assumed that this had to do with the shards from the Hermit section of the game.
Anyway thank you again for such a wonderful work, I honestly don't know how you managed to incorporate so many variables and alternative dialogue into the writing. Even after 15+ hours of playtime, I was still discovering new things by just trying different choices, that's amazing.