[Draugur]

Sorry, I don't know that (I would also like to know) but I've got another question:

The Hinamizawa Syndrome causes paranoia and makes people kill others because they're afraid that otherwise they will get killed themselves.

But in Meakashi-hen

Spoiler for Meakashi:

Shion is shown as a sadistic torture maniac. So is sadism also caused by the syndrome or is it simply Shion's personality who, being ready to kill, also likes to kill extra cruelly?