Will-o'-the-wisp

The wisp is an undead monster, the result from a fusion of demonic energy with the soul of a person that has died alone. Their bodies are comprised of raging flames of jealousy and they wear something like a cage around their body to hold the flames in. They are persistent, ferocious monsters. Because of their loneliness and feelings of dissatisfaction, they are extremely jealous of the living; especially lovers or married couples that seem to be happy. When they see a man and woman in love, their flames increase in intensity and their ferocity increases even more. Due to this envy and jealousy of the living, there is always a darkly obscene passion swirling in their hearts.