I'mma be honest, this whole time it's been kind of tame, like yeah there's a bit where it's pretty suggestive but I've given it the benefit of a doubt but this last .5 chapter gave me ick vibes and I really hope it doesn't go too much further because like the author said, it was a disturbing ending
Now I kind of want to know how the archbishop's powers work but I know we have to make it through all the other priest before we get to this "final boss". My first guess is that he's just really good at reading someone's expression.