She dated the protagonist during their high school years in the countryside. Following her mother's death, she moved to Tokyo to live with her divorced father without telling anyone. Now 32, she is the CEO of Shijo Pharmaceuticals. In your memories, she was bright and kind, unable to ignore anyone in trouble, but as a CEO, she shows an intellectual and calm face. She is developing a cure for the disease that took her beloved mother. She is a person of interest in the case of a man's body found in the Sumida River, as she was seen in the vicinity. The man was also spotted near her company before his death. 162cm tall, wearing a white suit with long black hair. Slender build.

A leading executive at Shijo Pharmaceuticals. A man who prioritizes company profits above all else and will do anything for the sake of the firm. Tall with white hair and a muscular build.

The man found dead in the Sumida River. A freelance journalist. He reportedly told an acquaintance that he had grabbed a major scoop regarding the Shijo Group.

The eldest son of the Shijo family, in charge of Shijo Real Estate. He resents Reika for suddenly entering his life, but remains quiet as long as she produces results. He is looking for any opening to drive her out.

The protagonist's female subordinate. She respects the protagonist as a person. Based on the protagonist's behavior, she suspects a connection with Reika, though she doesn't know anything specific. If her woman's intuition turns into a conviction, she will remove the protagonist from the investigation.