Onryo’s are vengeful spirits (Yurei). These spirits seeks vengeance for the horrible deaths they’ve suffered caused by another person. They hold grudges for a long time. They are so powerful and inflict harm or kill anyone. Onryo haunts and curses the people that caused their deaths. The curse can be passed or transmitted to another person like a contagious disease. Their hatred are so strong that the victims haunted suffers for a long time.