The main female protagonist and the newly assigned Inspector of Unit 1. Considered a model citizen due to her ever calm demeanor and for passing the exams with the highest score for employment on several public sectors and private corporations. She decided to join the police due to being the only place where no one obtained a score as high as hers, thus she believes to be able to do something there that no one else can.
She is the only person in the security department who knows the true identity of the Sibyl system, and still keeps this secret to not spoil Kogami Shinya due to the agreement made between her and the Sibyl.
She is also told the truth about the death of Kagari when she found out about the identity of the Sibyl system.