Hina was Sadao´s wife and Hachi´s sister in law. She was captured by Lady Masako and Jin Sakai while they were investigating the genocide of clan Adachi. She was clearly afraid of Masako's vengeful nature and much preferred talking to Jin, shown when she gave him the information he needed in The Husband. After giving him the information, Hachi tried to rescue her, but due to her screaming decided to kill her.
Hina's dead body. Image by Knowll.