[ SPOILER ALERT. If you don't want to see any spoilers, do not proceed to read. ]
I rarely see a character was made so real that I think I want to meet her someday somehow. This game has 3 endings, each ending leads you to different feel, though it didn't affect any of the analysis results. If you have played long enough, you can see which choices that belongs to Es, Facade, or neutral.
And, even though I know that adding more books to collect butterflies (this is different from the book that player and Es talked about after the true ending) means adding more storyline (cause the last book in it seems pointless), maybe adding some new lines for Es would be okay? I love talking to her so much.
And if you're a big fan of the game, be sure to check the game's website (they have wallpapers to download) and leave review <3