Kusunoki Hana is Hinami's younger sister, four years younger. She became ill at age 13 and was hospitalized for four years with an unknown illness that affected her respiratory organs. She is a passionate gamer who passed time by playing video games at home, even causing arguments with her father over her habit. She underwent emergency surgery which, through God's intervention, succeeded completely. She shares a close bond with Hinami, and they used to shop, cook, and study together. Her illness deeply affected the family. After the surgery, she makes a full recovery.
