Kayo Hinazuki

Kayo Hinazuki is Satoru's primary school classmate and one of the victims of the serial kidnapping case 18 years ago. She was a loner due to her mysterious family life, which made her an easy target to kidnap. In an attempt to prevent her kidnapping, Satoru desperately tries to befriend her.

History
Kayo's mother, abused her quite a lot throughout her life. Many injuries included suffocation, bruises and other tortures. When Kayo first met Satoru during the 18 year "Revival" she asked Satoru to kill someone for her (meaning it as a' joke'), however she had actually wanted him to kill her mother, out of her depression from the abuse her mother gave her.