Interesting... I can't speak with ghosts myself, but it is strange that blood magic is what caused the berserk state. I'll have to look into it further myself, to see if there's any way to counteract it.

[ After all, she is an apothecary, and if there are people who are still going into that state, then she needs to find a cure, in case of emergency. ]

Perhaps it's more underground, then.