Ayana Hirose is a tertiary character featured in the fourth part of the JoJo's Bizarre Adventure series, Diamond is Unbreakable. Ayana is the older sister of Koichi Hirose and the daughter of Mr. and Mrs. Hirose, and she is in her final year at an all-girls high school. She and her mother are attacked by Tamami Kobayashi, who amplifies their guilt with his Stand, The Lock. (Source: Jojo's Bizarre Encyclopedia)