“there are subsets called Onryo and Funayurei, which influence the type of spirit we see in Ringu’s ghost, Sadako Yamamura. Onryo are vengeful spirits, whereas Funayurei are the spirits of those who died at sea and appear as scaly, fish-like humanoids. In the original Ringu, it is hinted that Sadako is the product of a union between a human and a sea god.”