I don't pretend to be an expert on mental health or DID, but I did a lot of research into it and watched accounts from people with DID. The way the girls are (I won't spoil it) but -- if they had a human psyche, it'd be very likely they'd have some level of multiplicity within their mental space. Kana is just the most affected.
I really appreciate the comment, and the fact you took the time to leave one! I'm really hoping this project carves it's own niche within the visual novel community, as there is overlaps to be sure, but I wanna contribute in my own way too! ^-^ Cute girls mixed with psychological horror is just something I really enjoy!
Thanks again!!!