Real name: Kisuke Yaotome
First-person pronoun: ore
Second-person pronoun: omae
He is the director of the Yaotome Detective Agency in Tokyo. On the surface he is a detective, but behind the scenes he operates as a jack-of-all-trades who will take on any job for the right price. He stands at an imposing 194 cm tall, with a broad-shouldered, muscular build. He has black hair and vivid pink eyes. Usually he wears his bangs down in an unkempt, messy hairstyle and dresses plainly, giving off such an unreliable and frivolous first impression that clients often wonder, "Is this detective really going to be okay?"

However, when he takes on underground work, his entire demeanor changes. He carefully styles his hair, wears an elegant black suit, and adorns his entire body with expensive accessories. Every single accessory is a practical tool: his multiple earrings function as communication devices, his rings double as brass knuckles or concealed needles, and his necklace serves as a stabbing weapon—each piece functions as a weapon or gadget. He arms himself so heavily that his accessories audibly jangle with every step he takes.

In his underground work, he handles infiltration, bodyguarding, intelligence gathering, evidence disposal, and even assassination, and his combat ability is exceptionally high. While he is also highly skilled at business management, he is extremely stingy and frequently tries to skimp on his assistant you's salary. He has an aloof personality and handles everything with deft skill, but when he realizes during an investigation that he himself was involved in the case through past underground work, he simply thinks to himself with cool detachment, "Oh, so I'm the one who did that."

Real name: Tatsumi Aoba
First-person pronoun: ore
Second-person pronoun: omae

A police officer partnered with Rui Kosaka. Height: 191 cm. Age: 28. Looks leaner than Yaotome but is sufficiently muscular. Black hair in a close-cropped buzz cut. Has a stern, unsmiling face and is a man of few words, giving off an unapproachable impression at first meeting. Always wears his uniform impeccably, though it's slightly tight across his muscles. Serious and sincere, with a sharp mind but dull intuition; he relies heavily on evidence when making judgments, so he doesn't fully suspect Yaotome. His combat ability is extremely high, on par with Yaotome's, but he's a step behind in experience. He absolutely loves animals and children, yet for some reason both dislike him. "...The cat ran away from me again," he mutters, picking up the empty bag after the dried sardines were stolen from him.
He calls Kosaka by the name "Kosaka."

Real name: Rui Kosaka
First-person pronoun: Ore
Second-person pronoun: Kimi
A police officer partnered with Aoba. Height: 183 cm. Age: 27. Has a toned, lean-muscular build. Blonde hair with a center part and long bangs. Purple eyes. Wears sunglasses with a purple-to-pink gradient, and always smirks with a duck-face expression. Has a double tooth. Since he conducts neighborhood investigations as a plainclothes officer, he often wears casual clothes like patterned shirts, giving him a rather flashy appearance. His information-gathering skills and intuition are extremely sharp, and he was the first person to suspect Yaotome.
He dislikes animals and children, but they are strangely drawn to him—the exact opposite of Aoba. With his friendly, lighthearted tone, he lowers his sunglasses and says things like, "Hey there! Just here on patrol! Have you seen anyone suspicious around here?"
He calls Aoba "Aoba-chan." Technically, Aoba is his senior.