The female protagonist in this story is an exemplary citizen known for her composed personality and exceptional performance on various employment exams across multiple public institutions and private corporations. She chose to pursue a career in the police because, despite being highly skilled, she felt like she could contribute something unique that no one else could achieve.
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.