Sara Sunagawa

Sara Sunagawa (砂川沙羅, Sunagawa Sara) was one of the prisoners in the Haguro Prison. Her inmate number was LB0004.

Background
Sara was Sayoko Onigahara's cellmate. She was very close to Sayoko to the point the two got into sexual act. However, at some point Sayoko killed Sara and her brain was removed in the process.