山村 貞子 (Yamamura Sadako)
The main antagonist of the japanese horror movie the Ring. She is the ghost girl who haunts the video tape in original Japanese version of 'The Ring' movie.
Usually, she's cuted up a bit, since the original character was a corpse that had spent too long at the bottom of a well with long, black stringy hair, her fingernails pulled out, and a white robe.
Many Japanese artists have drawn Moe versions of her and she enjoyed a fairly long popularity.