"According to legend, Hanako-san is the spirit of a young girl who haunts school toilets, and can be described as a yōkai or a yūrei."
"Like many urban legends, the details of the origins of the legend vary depending on the account; different versions of the story include that Hanako-san is the ghost of a World War II–era girl who passed away while playing hide-and-seek during an air raid, that she was offed by a parent or stranger, or that she took her own life in a school toilet due to bullying."
Son of Oedon 
Ahri"
Waning Crescent Moon
Spring
Hunter 
Hunter