After Shinobu fought Douma she was turned into a demon unwillingly by Douma. In the Uppermoons rank if they love someone that was a human they could turn them into a demon and they are the Uppermoons property(They are called Props.). It will show it in their eyes, the same mark as the Uppermoon. Also if the Uppermoons Prop's neck gets cut by a swordman the Uppermoon can give them a drop of their blood and they will survive.
10 parts