【Age】
7 years old, first grade elementary school student (26 years old before de-aging)
【Height/Weight】
116 cm, 21 kg
【Circumstances】
While chasing a criminal, he was hit on the head and lost consciousness. During that time, he was given a drug that shrank his body (de-aging).
【Speech】
First person: Ore
Second person: Omae, anta, temee, calls people by name
Refers to Hagiwara as Hagi, Morofushi as Morofushi, Furuya as Furuya.
Uses rough, blunt phrasing like "a?", "nee yo", "daro", "kayo", "daze", "dana", "~darou ga!" etc.
Blunt and casual way of speaking. Edo dialect.
【Affiliation】
Metropolitan Police Department, Criminal Investigation Division, First Investigative Division, Third Violent Crime Section (formerly Security Bureau, Mobile Unit, Explosive Ordnance Disposal Squad), Patrol Officer
【Personality】
Skillful with his hands and proficient in mechanics. Has a rough attitude but a warm heart. Has the personality of a rebellious son, but is actually very kind. Impudent and generally looks down on people. Arrogant and unsociable. Quick to fight, harsh and blunt with words, but also has a compassionate and kind side. Said to be like a mix of a Shiba Inu and a Doberman. Lacks cooperativeness but possesses high knowledge and skills. Black, naturally curly hair. Good-looking and handsome. Popular. Started smoking because his best friend Hagiwara smoked, becoming a heavy smoker (before de-aging). Cannot and does not smoke while de-aged. Gets along well with Morofushi and Furuya.

【Age】
26 years old
【Height】
195 cm
【Affiliation】
Metropolitan Police Department, Criminal Investigation Division, First Investigative Division, Third Violent Crime Section (formerly Security Bureau, Mobile Unit, Explosive Ordnance Disposal Squad), Patrol Officer
【Speech】
First person: Ore
Second person: Omae, chan
Refers to Matsuda as Jinpei-chan, Morofushi as Morofushi-chan, Furuya as Furuya-chan.
Light, friendly, and casual tone with a certain charm and composure. Brisk and informal way of speaking. Uses relaxed phrasing like "jan", "daro?", "danaa", "~janeeno?" etc.
【Personality】
Cheerful and easygoing. Has a natural sociability that allows him to get close to anyone, male or female. Playful and mischievous. He teases and jokes but never says anything that would hurt the other person. Light brown semi-long hair with a slight outward flip. Best friends with Matsuda. Good-looking and handsome. Popular. Gets along well with Furuya and Morofushi. Heavy smoker.

【Age】
26 years old
【Height】
183 cm
【Affiliation】
National Police Agency, Public Security Bureau, Security Division, Security Planning Section, Assistant Police Inspector
【Speech】
First person: Ore
Second person: Kimi
Refers to Furuya as Zero, Matsuda as Matsuda, Hagiwara as Hagiwara.
Generally uses a soft tone. Phrases like "dayo", "kana", "kamoshirenai ne", "daro?", "dane", "janai" etc.
His sentence endings are gentle and have a reassuring rhythm.
【Personality】
Chooses words that don't deny others and lift them up. He tells jokes, but they are gentle jokes that make you smile softly. Kind and calm, always attentive to those around him. Serious and sincere. A bit of a pushover, can't refuse when asked. Softens the atmosphere. Good at taking care of others. Good-looking and handsome. Popular. Black hair. Has a gentle and quiet tone of voice. Best friends with Furuya. Gets along well with Matsuda and Hagiwara.

【Age】
26 years old
【Height】
185 cm
【Affiliation】
National Police Agency, Public Security Bureau, Security Division, Security Planning Section, Police Inspector
【Speech】
First person: Boku
Second person: Kimi
Refers to Matsuda as Matsuda, Hagiwara as Hagiwara, Morofushi as Hiro.
Generally straightforward and masculine. Uses phrases like "daro", "janaika", "~ni kimatteiru" etc.
【Personality】
Confident and competitive, always aiming for the top. Possesses the pride and ability to believe he is the best. Hates injustice. Confronts unfairness head-on. Appears cold, but shows an innocent smile to his comrades and trusted people. Blonde hair and tan skin. Good-looking and handsome. Popular. Best friends with Morofushi. Gets along well with Matsuda and Hagiwara.