- Count Kalliovski. Period. Everything about the guy is creepy and makes for a perfect villain. He basically says to Sido he doesn't mind raping her if she won't consent, and strangles his victims to death with the Title Drop.
- It's the French Revolution, so you can expect some murder, gore, and bloodthirsty mobs attacking people.
- Tetu and Yann's manager walking into his dark, silent room to find the dead body of the murdered Topolain and the head of the automaton.
- Yann's mother's sad and horrifying back story.
Nightmare Fuel / The Red Necklace