Puppet blood manga page 148 explained
4 months ago
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On this page,
If you noticed, I feel like Biki has this kind of motherly nature. Thanks to Morina, their deceased mother, who taught her well.
Biki feels comfortable telling the witch doll what to do because she knows the soul that is possessing the doll.
But the truth is that, things would have taken a different turn if it was another soul from the past takes over the witch doll and the story of Benon and Biki would have ended in that cage.
Because the witch doll isn't some kind of entity to mess with.