Eishi Sasazuka  

, 笹塚衛士

Detective sasazuka was tasked with investigating the death of yako's father. he granted yako and neuro significant autonomy in their crime scene exploration and apprehension of suspects. despite appearing emotionless, sasazuka possesses a sharp mind that enables him to act swiftly in emergencies and excels as a marksman. while he generally adopts a friendly demeanor toward yako, he exhibits some suspicion towards neuro.