These are all some very good relationships.
Now, I'm rooting for Miko not to be killed here because that'll be a type of depressing I'm not sure this series intends to go for, but I may be wrong. Also, because her relationship with Hinako is very wholesome and I'm looking forward to the drama and angst of her finding out she wants to be eaten by Shiori.
As for Shiori, she's my best girl and I want all the things to happen to her. I can't help but love the monster who doesn't try to pretend she is not a monster.
Sidenote: Even if it gets to a point when Hinako would taste sublime but Shiori can't bring herself to eat her, would Hinako be happy about that?