Sure, that would be really helpful! Can you PM your email so I can send you my next game script? I'm making Area-X now, a game set in the same setting as X-note. Many thanks in advance.
For your questions:
Actually, that's his natural hair color...lol. His hair color used to be dark green, but as he grow older, for whatever reason it became washed out green. Yeah...it's probably the river's fault. XD
As for the other question, it is part of the game design, but it also fits with the story. If you neglect any of the characters (minus Yuon which you can't ignore until chapter 5), that character can't be saved. In case of Oure, he just died. In case of Anon, 99.5% chances he will end his life. So, yeah, if there's any reason of why I didn't mention them in other character's path is because it would be very depressing to know what happen. ^^'''
Originally, I did think of making Oure-Anon path, but it gets way too confusing so I cut that part off. While Anon technically doesn't remember Oure, his subconscious remembers it. His fear of using his power stems from Oure's incident, which is why he didn't use it to save Essi's mother.
Oh, and your last point:
Actually, I really like Loil as a villain than X, to be honest. I'm not sure where people get the idea X is the villain, even from the intro. It was purposely left ambiguous. X fits the mysterious boy role rather than villain.
Perhaps you didn't Loil exciting because he's oh-so-evil, but I actually thought the opposite. Before his appearance, I actually thought the story was rather dry. Let's say if the story is missing him, there would be no climax in Yuon nor Oure's path. Making Anon appears evil in other path would be a giant spoiler to his own path.
I supposed it boils down to what kind of expectation you had. If you are expecting a story of a psychopathic child grown up to be a sadistic killer then it probably will disappoint you.
I'm biased because Loil is one of my most favorite character to write in X-note. My favorite part of the entire story is actually the talk of Loil and Anon. It's so crazily disturbing---like listening to two mad men's conversation. I really love it.
Uwa...that's long. lmao.