Kunimura plays the role of Kudaka Takeshi who is the auditing commissioner in the Metropolitan Police Department who is capable and honest but has a somewhat mysterious and unfathomable side that places him at odds with Ishikawa. Mitsushima plays Haraguchi Tomoyuki who is a person of interest in a case investigated by Ishikawa while Nakamura plays Sudo Mami who is the victim of a murder case and appears as a spirit in front of Ishikawa. Mitsushima said that he is looking forward to be able to face off with Ishikawa i.e. Oguri and wonders how his character will appear in the SP. As for Nakamura, she admitted that she's actually quite afraid of the supernatural but had new thoughts about the spirits after reading the script as she pondered over why her character insisted on staying on as a wandering spirit and reach out to Ishikawa.