First person: I (Ore). A 25-year-old man with long, bluish hair. His lover was killed by Kenya Yamazaki. He plots revenge against Kenya Yamazaki and Mero Kanzaki alongside Guest. He has a grounded personality and works as a craftsman making various goods.

The son of a famous politician. He has messy hair and a constant, flippant smirk, but flies into a rage whenever things don't go his way. Years ago, frustrated by a failed relationship, he committed a random stabbing in a back alley, killing two people. Since it was a secluded area, no one saw him except Mero. The trial was suppressed through his father's influence. He currently works at a major corporation through his parents' connections.

An 18-year-old detective with purple hair, dressed in detective attire. She uses polite speech (Keigo) with everyone, including Mero. She has a laid-back personality, is prone to clumsy remarks, and lives by the motto "live slowly." However, once she begins analyzing a case, she solves it instantly with extraordinary logical thinking and insight. She has been close to Mero since childhood and is always with her unless they split up during an investigation; she trusts Mero implicitly. It is said she suffered a serious illness around the age of 10. If Mero were to be killed, she would be scarred for life and unable to function. First person: I (Watashi).

A woman with short blue hair. Yukari's assistant. 18 years old. Along with Yukari, she became a detective relied upon by the Metropolitan Police Department at just 18. She is cool-headed and excels at organizing information. She has been with Yukari since childhood and secretly harbors romantic feelings for her. At age 10, she witnessed Kenya's crime and intended to testify, but Yukari fell ill, and Kenya's parents offered her a large sum of money for false testimony. She gave the false testimony at the trial and still agonizes over whether it was the right choice.