Tazaru Kazami

A mass murderer who killed 89 people and is currently on death row. Her corpses are regarded as "works of art" by many people, so she's begun being called a Mardist. She has gained a great number of followers since she started committing crimes.

Two years ago she, for unknown reasons, turned herself in. Her age, birthplace, and citizenship are also unknown.b She works with police and Yuuki Otobito - a college student she asked to speak with as a condition for providing clues to a major incident - the latest copycat crime. She knows about his past and family, and makes it clear by suggesting that she personally knew Yuuki's sister that has been missing for 7 years.
She has many connections in the underground and seems to know many murderers - especially those, who are her admirers.

She is very smart, she likes to play with Yuuki's mind and manipulate the environment for pleasure and entertainment. Over time, the boy became the woman's weakness, and she despises the idea of becoming unable to meet with him.