Sumio Tateno  

, 立野 寿巳男

Officer Tateno was a dedicated police officer who worked at the Beika 5th district station. He had a friendly demeanor and excelled at interacting with others. His colleagues and neighbors highly respected him due to his diligence, kindness, and approachability. Despite being an anime-only character from The Suspicious Initial K, Officer Tateno's reputation as a reliable and trustworthy officer would soon lead him to be transferred to the criminal division.