Don’t you know that Key kinda have obsession to wings? See Ayu’s backpack for one, then the whole theme for AIR, and although not officially released by Key, Hinoue did draw Nagisa with wings in one of her self-published work, “Hikari” as I posted here.
I don’t know the color scheme for Sala, but if she had white hair that’d be Makishima from Psycho-Pass…
Seriously I can’t shake the similarities off.
