It's a really interesting story, though there's a degree of ambiguity that comes from them being pretty damn young. Like, [Spoiler Name] is definitely right that Harmony is trying to use hypnosis to do things, but I'm kinda left unsure, even after seeing things from Capella's perspective, just how much it does. [Spoiler] thinks it does a lot, and no doubt so does Harmony, but they're also just kids. Fucked up kids going through it, but kids. So you're left clear that something's going on, but it doesn't feel as if the story is precisely clear about what Harmony is doing with that... and I don't think that's really a flaw.
Excellent and fascinating story!