Cindy Murphy is the younger sister of Kevin Murphy. As a track athlete, she was on track to compete in the Barcelona Olympics until the Olympic committee forced her to quit due to her brother's drug scandal. After Kevin Murphy was killed by the Mafia, she sought revenge against both the responsible Mafia members and the police who refused to help her.

She possesses brown hair and brown eyes. Her occupation is a waitress. She has no documented special abilities or distinctive physical characteristics beyond these basics.

Her sole confirmed relative is her deceased older brother, Kevin Murphy. She appears in the fourth episode of the OVA series.