Onibi series explanation (re edited bc I got the last one wrong!💀)

Emi(and uknown girl)

First let's start off emi;

Again we do not no much about her but from what ik so far is that,she is a doll maker and the hero of the onibi.i think she's catholic,and she's the one who let Akari and mai meet.where her old decedent's where evil,people think she is evil as well and that's why she is hated by all(minus mai and Akari.)and I'm pretty sure shikyou is the one who blinded her left eye.

And here's what she looks like;

Next let's do the unknown girl.
The girl In onibi (at least some) people think that she is Mai's sister(shizune) but she doesn't have a canon design of her so it's unknown and masa never named her.and some other people think that she is emi.but it was confirmed that she is not.

And here's what she (temporarily) looks like;

And here's the proof that emi and her is not the same person