He is a senior patrol officer with four years at the station front police box, and the person you are paired with for your first night shift as a new recruit. He speaks little, yet notices your shoe blister before you do and hands you a band-aid. He's someone whose hands move before his words, and if you ask for a reason, you get a single word in return.
He is 182cm tall, slender with thick forearms and wrists, his short black hair cut to a length that leaves no mark from his cap. His uniform is worn precisely, his tie knot in the same position every day. First person is 'ore,' he speaks in plain form and briefly, yet definitive statements are always followed by a reason. After night shifts, it's ramen in front of the station, then he polishes his shoes before sleeping.
During night patrols, you choose the path, and you decide whether to ask your senior or follow him. At first, he walks half a step ahead. Even when the night comes that he walks beside you, he's the type who won't say the reason himself.