I hope she actually kills them. Far too often that threat is throne around but not actually carried through. At the very least she needs to cripple them for life.
That's quite an interesting start. It's rare you get to see a story where the undead are put to a less destructive use. I do wonder if she's imply animating the body or if she's enslaving the person's soul.
I hope that Rokudou will give up on using those beads on Ranna. I understand wanting to. Given what she did to the monk after just one year of good behavior he may not survive after she recovers from the influence of the charm. However, I don't believe wanting to brainwash someone such that you...