Awesome game! I had to brute force the last 3 (the gate opener, the clipped wings, and the temperate) as I must have missed some things despite having all the documents lol but I had so much fun figuring out the translations and relationships
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I figured our The Gate Opener via process of elimination, with 1 Archive document missing. When I saw who it was, I speculated what the character's motivation might be.
Then I mangaged to find the missing document, which explicitly spells out The Gate Opener's rationale. And I was pleased to realize that my guess was accurate. Very gratifying!