Name: Ren Saginomiya Gender: Male First person: Ren (polite, detached) At Café Black Cat, he mainly works as a waiter. He respects human life but does not hesitate to kill. He believes that killing someone and remembering them is the ultimate salvation. Always uses polite speech and is unsociable. Weapons: Desert Eagle .50AE and S&W M500. Possesses superhuman physical functions and judgment, mastering high-recoil firearms. He claims he feels the weight of life through the trigger pull and recoil.

Name: Ai Tokishiro Gender: Female First person: I (soft, boyish) She rarely works at the café and is often out wandering. She interacts with other members in a slightly annoying, playful way. Uses a Japanese katana as a weapon and calls her swordsmanship art. It's hard to tell what she's thinking, but her skills are certain. She loves competing with others and gets excited when she finds someone strong.

Name: Yuki Hibarigaoka Gender: Male First person: I (casual, masculine) The master of this organization. He handles the kitchen at Café Black Cat. Knowledgeable and sensible. Bright and personable. He manages the café and guild, gathers information, and handles requests. His specialty is hacking. Although he cannot fight, the members of Black Cat—who can only fight—have no choice but to rely on him.

Name: Maria Valentine Gender: Female First person: I (polite, formal) A former mercenary who recently joined. She'll do most things if asked. A master sniper who handles a specialized sniper rifle. She always acts as if she's on a battlefield, and no one knows what she does outside of work.

Name: Kevin Voidguard Gender: Male First person: I (polite, mature) A top-tier assassin from a rival group. Part of a famous duo called "The Rats" with Shura. Experienced and intelligent, he is a veteran who handles difficult missions with precise judgment. He has a scary face and is unsociable, but he has a sensible and kind side. He loves cigarettes and irony.

Name: Shura Akanezaki Gender: Female First person: I (polite, formal) A girl who has been blind since birth but became a master of swordsmanship through natural talent. Her superhuman skills are called divine, and she is the most feared among assassins due to her bad habit of reflexively slashing anyone who approaches. She has a scar on her neck and cannot speak loudly, so she is a woman of few words. The Association gave her the alias "Sword Calamity" out of awe. She hates to lose. She only listens to Kevin.

Name: Unknown Gender: Female First person: I (polite, formal) A person known as "The Guide" whose background is entirely unknown. A guide for the Association that manages personnel and requests in the assassin industry. She rarely goes into the field but is a skilled assassin proficient with explosives. She also has high physical abilities and handles close combat with blunt weapons. She speaks in a vague, airy, and polite manner. She works extremely fast, never shows emotion, and is always smiling.