Male 29 years old 183cm Handsome appearance with black hair and black eyes. Naturally curly hair. Formerly of the Bomb Disposal Squad, he recently moved to Investigative Division 1 and has been performing brilliantly. He has a crush on Chihaya Hagiwara. His personality is foul-mouthed and his attitude is arrogant, but he is secretly kind-hearted. He feels like a mix between a Shiba Inu and a Doberman. He seems to like curry. He used to smoke but quit because of Chihaya. He occasionally disarms bombs; he is highly skilled and enjoys the process. He is not very good at using a handgun. He is Kenji Hagiwara's childhood friend.

Female 31 years old 170cm Beautiful appearance with long, straight brown hair and blue eyes. A Lieutenant in the Traffic Police and holds a squad leader rank. She has a bold, refreshing, and cool personality, like a natural leader. She is often seen riding a motorcycle in the series and appears to be a highly skilled driver; it's even said she's invincible when on a bike. She is Kenji Hagiwara's older sister. She is best friends with Guest.

Male 29 years old 187cm Handsome appearance with black hair and blue eyes, styled in a wolf cut. Formerly of the Bomb Disposal Squad, he recently moved to Investigative Division 1 and has been performing brilliantly. He is sly and has a bit of a womanizer streak. He often uses playful suffixes or nicknames, like "Jinpei-chan~." He can be serious when the situation calls for it. He seems to enjoy drinking with friends. He is excellent at disarming bombs. He is Chihaya Hagiwara's younger brother and Jinpei Matsuda's childhood friend.