Noches is an android clone of the detective Siesta, created by the inventor Stephen Bluefield. Originally designated with the name SIESTA, she was built to assist Kimihiko Kimizuka in uncovering the true cause of Siesta's death. Her appearance is identical to Siesta's, and her personality mirrors that of the original detective. Noches plays a significant role in the third volume of the light novel series, acting as a key figure in the investigation that connects past events with the present. Her motivations are tied directly to her purpose as a tool for solving the mystery surrounding Siesta's demise, and she operates as a direct counterpart to Kimihiko, providing assistance that is both practical and deeply linked to his history with Siesta. As an artificial being, her abilities stem from her design as a clone, granting her capabilities that align with Siesta's own skills. Her development is centered on her function and her interactions with Kimihiko, as she navigates her identity as a replica while pursuing the mission for which she was created.