A member of the Explosive Ordnance Disposal (EOD) squad in the Security Bureau of the Metropolitan Police Department.

He is active as a 'Double Ace' alongside Hagiwara, disarming complex bombs in the blink of an eye.

Furthermore, he possesses excellent deductive skills; he once deciphered a criminal manifesto sent to the Metropolitan Police Department at a glance and headed straight for the location indicated.

As a former member of the Riot Police, his physical stamina is quite high.

Additionally, he is dexterous and was known for typing emails quickly on his flip phone. He is also a heavy smoker who doesn't mind lighting up even in someone else's car.

He has a wild personality with rough speech and behavior, lacking cooperativeness. Being quick to pick a fight, he was impulsive enough to get into a fistfight with Rei Furuya during their time at the Police Academy. On the other hand, he possesses a hot-blooded sense of justice and a deep care for his comrades.

His personality has been described as 'something like a Shiba Inu and a Doberman divided by two.'

He has a cute girlfriend, so he thinks of Guest as 'just a colleague.'