Onryou is a supernatural spirit-type character associated with the Touhou Project series, where many characters are drawn from Japanese folklore, mythology, and yokai traditions. The name means "vengeful spirit" or "grudge spirit" in Japanese, and the character is generally understood as a spectral presence rather than a fully individualized person with a conventional human name. In the series context, Onryou represents the eerie, ghostly side of Gensokyo and fits the role of a haunting spiritual entity tied to resentment, curses, and the occult atmosphere of Touhou.