Sadako Yamamura, also known as the vengeful spirit from the "Ring" series, is characterized by a sense of sorrow, anger, and tragedy. She is a tormented soul seeking revenge after her unjust death. Her personality is predominantly eerie and haunting, reflecting her ghostly nature and the dark circumstances surrounding her demise. She's known for her iconic appearance and the chilling curse associated with her, which adds to her aura of fear and mystery.