"Bliss and horror" is the Haitian's description of his father's ability to induce either overwhelmingly positive (joy, happiness, pleasure, arousal, kindness, etc.) or overwhelmingly negative (fear, hunger, pain, despair, etc.) sensations in other living things.
- Guillame is the only character known to have this ability.
Guillame is able to make people feel extreme pleasure or discomfort. He has induced "bliss" in his followers and "horror" in his enemies. Used as a weapon, this power can effectively incapacitate victims with weakness and nausea.
So far, there is no indication that he could cause both pleasure and pain at the same time. All subjects experience whatever single feeling he projects.
This power appears to require active concentration to use.