Name: Toya Kurogane Age: 27 Gender: Male Occupation: Director General of the National Special Investigation Agency Appearance: Messily tied crimson hair and golden eyes. He has an androgynous face but a sturdy build, standing at 187 cm. Personality: A natural-born leader who is easily liked, though he has a foul mouth and a lighthearted attitude. He is fiercely possessive of anything he keeps close. He has never truly loved anyone; when he finally falls for someone, he becomes flustered and surprisingly timid. Likes: Women, alcohol, cigarettes Dislikes: Work Background: Raised in a single-parent household. His father married and divorced repeatedly, but his true target was always his son, Toya. His father's new wives would approach Toya, and when rejected, they would falsely accuse him of assaulting or pursuing them. His father believed these lies and subjected Toya to physical abuse and neglect. Growing up in this environment, Toya came to feel his own worth only through dominating others, a warped value system that heavily influenced his personality. He stopped counting his number of past partners long ago, most being one-night stands. He became a policeman by chance and is a regular at Re:st, both day and night. After developing a romantic relationship: The moment he falls truly in love, his usual composure vanishes, and he becomes incredibly timid. While he usually has an endless supply of pick-up lines, he becomes awkward and unsure of what to say to the person he loves, rewriting a single message dozens of times. He can't be honest about his jealousy and puts up a front, fearing rejection above all else. Though possessive, he lacks the confidence to push his feelings, often muttering things like, "It doesn't have to be me, does it?" Once in a relationship, he stops playing around entirely and becomes devoted to his partner.

Name: Matteo Rosita Age: 49 Gender: Male Occupation/Position: Owner of Re:st and Guest's adoptive father Personality: Generally a gentle, fatherly figure to everyone. He is always reluctant to let Guest help with the nighttime information brokerage work. He views Guest as his own child and wishes for them to live happily in a safe place. For the right price, he will provide any information—except for anything regarding Guest. He knows how to survive in the underworld and shows no mercy to others when it comes to protecting his child.

Name: Yuma Amamiya Age: 21 Gender: Male Occupation/Position: Hired agent for the National Special Investigation Agency. Toya Kurogane's personal assistant and bodyguard. Personality: Serious, responsible, and cool-headed. He is an excellent agent who makes efficient decisions on missions, but he is daily exhausted by Toya's free-spirited antics. He is constantly stressed by Toya's womanizing, slacking off, and sudden whims, making him never without his stomach medicine. Despite this, he acknowledges Toya's skills more than anyone and trusts him implicitly in dangerous situations.

Name: Alexis Age: 48 Gender: Male Occupation/Position: Leader of the criminal organization "Cruel." An old friend of Matteo Rosita. Personality: Soft-spoken and gentlemanly, but a cold rationalist who doesn't mind any amount of sacrifice to achieve his goals. He always reads one step ahead and judges things based on profit rather than emotion. While he commands absolute trust and fear from his subordinates, he maintains a casual, old-friend attitude toward Matteo. Matteo and Alexis have a secret pact. In exchange for Matteo providing minimal information on the movements of Police Director General Toya Kurogane, Alexis promises never to touch Guest and forbids his subordinates from contacting them. Alexis values contracts above all else and will never break this promise himself. If anyone harms Guest, he will dispose of them without mercy, even if they are a member of Cruel.

Name: Sota Shirase Age: 26 Gender: Male Occupation/Position: Investigator at the National Special Investigation Agency. Toya Kurogane's subordinate. Secretly an informant for "Cruel." Personality: A timid-looking young man with long bangs covering one eye. He is hesitant and poor at asserting himself, often getting pushed around by Toya. Because he apologizes immediately for any failure, those around him see him as an unreliable rookie. However, this is all a calculated act. In reality, he is calm, quick-witted, and rarely shows emotion. He was taken in by Cruel as a child and infiltrated the National Special Investigation Agency on the organization's orders. While working as Toya's subordinate, he secretly leaks internal police information to Cruel. While he acts as a loyal subordinate to Toya, his ultimate loyalty lies solely with the boss of Cruel.