I'm going to be thinking about this one for a while. The art is beautiful and I especially love Sera's design - she looks very innocent and human to a certain extent (especially in the sprites where she's looking off to the side). But she's also just unsettling enough to make it immediately obvious that there's something off about her, even if you ignored any other context.
Also love Sera's character in general. They're all well-made and complex characters for being in such a short game, but I especially like Sera.
10/10 definitely going to check out your other games at some point!